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Norris exactly what people call me and that i totally dig that nick name. What she really enjoys doing is badge collecting but she can't make sure it is her occupational. Production and planning is when he supports his family. My family lives in Ohio. If you wish to find out more away my website: http://Archive.org/details/miley_cyrus_playboy<br><br>my weblog [http://Archive.org/details/miley_cyrus_playboy miley cyrus playboy]
{{About|the concept in physics|the [[Internet forum]] software|Simple Machines Forum}}
[[File:Table of Mechanicks, Cyclopaedia, Volume 2.png|thumb|250px|Table of simple mechanisms, from [[Chambers' Cyclopedia]], 1728.<ref name="Mechanicks">{{Citation |last=Chambers |first=Ephraim |year=1728 |title=Table of Mechanicks |work=Cyclopaedia, A Useful Dictionary of Arts and Sciences |volume=Volume 2 |location=London, England |page=528, Plate 11 }}.</ref> Simple machines provide a "vocabulary" for understanding more complex machines.]]
 
A '''simple machine''' is a non-motorized device that changes the direction or magnitude of a [[force]].<ref name="Paul-Roy-Mukherjee-2005">{{Citation |last=Paul |first=Akshoy |last2=Roy |first2=Pijush |last3=Mukherjee |first3=Sanchayan |title=Mechanical sciences: engineering mechanics and strength of materials |year=2005 |publisher=Prentice Hall of India |isbn=81-203-2611-3 |page=215 |postscript=.}}</ref> In general, a simple machine can be defined as one of the simplest mechanisms that provide [[mechanical advantage]] (also called [[lever]]age).<ref name="Asimov1988">{{Citation |last=Asimov |first=Isaac |title=Understanding Physics |year=1988 |publisher=Barnes & Noble |location=New York, New York, USA |isbn=0-88029-251-2 |url=http://books.google.com/books?id=pSKvaLV6zkcC&pg=PA88&dq=Asimov+simple+machine&cd=1#v=onepage&q&f=false |page=88 |postscript=.}}</ref>
 
Usually the term refers to the six classical simple machines which were defined by [[Renaissance]] scientists:<ref>{{cite book
  |last=Anderson
  |first=William Ballantyne
  |title=Physics for Technical Students: Mechanics and Heat
  |year=1914
  |publisher=McGraw Hill
  |location=New York, USA
  |url=http://books.google.com/books?id=Pa0IAAAAIAAJ&pg=PA112
  |accessdate=2008-05-11
  |pages=112–122}}</ref> 
* [[Lever]]
* [[Wheel and axle]]
* [[Pulley]]
* [[Inclined plane]] (ramp)
* [[Wedge (mechanical device)|Wedge]] (moving ramp)
* [[Screw (simple machine)|Screw]]
 
A simple machine is an elementary device that has a specific movement (often called a [[mechanism (engineering)|mechanism]]), which can be combined with other devices and movements to form a [[machine (mechanical)|machine]]. Thus simple machines are considered to be the "building blocks" of more complicated [[machine (mechanical)|machine]]s.  This analytical view of [[machine (mechanical)|machine]]s as decomposable into simple machines first arose in the Renaissance as a [[neoclassicism|neoclassical]] amplification of [[ancient Greece|ancient Greek]] texts on technology,<ref name="Usher">{{cite book
|last=Usher
|first=Abbott Payson 
|authorlink=
|coauthors=
|title=A History of Mechanical Inventions
|publisher=Courier Dover Publications
|year=1988
|location=USA
|pages=98
|url=http://books.google.com/books?id=xuDDqqa8FlwC&pg=PA196#v=snippet&q=wedge%20and%20screw&f=false
|doi=
|isbn=0-486-25593-X
|postscript=.}}</ref> and is still a central part of [[engineering]] in today's age of [[applied science]]. For example, wheels, levers, and pulleys are all used in the mechanism of a [[bicycle]].<ref name="Prater1994">{{Citation
|last=Prater
|first=Edward L.
|year=1994
|title=Basic machines
|url=http://www.constructionknowledge.net/public_domain_documents/Div_1_General/Basic_Skills/Basic%20Machines%20NAVEDTRA%2014037%201994.pdf
|publisher=U.S. Navy Naval Education and Training Professional Development and Technology Center, NAVEDTRA 14037
|postscript=.}}</ref><ref name="USBureauNavalPersonnel1971">{{Citation
|author=U.S. Navy Bureau of Naval Personnel
|year=1971
|url=http://www.webpal.org/SAFE/aaarecovery/5_simple_technology/basic_machines.pdf
|title=Basic machines and how they work
|publisher=Dover Publications
|postscript=.}}</ref> Between the simple machines and complex assemblies, several intermediate classes can be defined, which may be termed "compound machines"<ref name="U_Virginia_elementary_curriculum">{{Citation
|url=http://galileo.phys.virginia.edu/outreach/8thgradesol/compoundmachine.htm
|title=Compound machines
|publisher=University of Virginia Physics Department
|accessdate=2010-06-11
|postscript=.}}</ref><ref name="Asimov1988"/><ref name="Wallenstein2002">{{cite conference  |last=Wallenstein |first=Andrew |title=Foundations of cognitive support: Toward abstract patterns of usefulness |date=June 2002 |booktitle=Proceedings of the 9th Annual Workshop on the Design, Specification, and Verification of Interactive Systems |publisher=Springer |url=http://books.google.com/books?id=G9sZf7D24a8C&pg=PA136&vq=simple+machines&source=gbs_search_r&cad=1_1&sig=dynXLdHrC2AX55hDds_zGQRJv_U |accessdate=2008-05-21 |page=136 |postscript=.}}</ref> or "[[machine element]]s".<ref name="Matthews-ASME-2e-2005">{{Citation |last=Matthews |first=Clifford |last2=[[ASME]] |title=ASME engineer's data book |page=249 |publisher=[[ASME]] Press |year=2005 |edition=2nd |url=http://books.google.com/books?id=dPS2KU0gj-8C&pg=PA249 |isbn=978-0-7918-0229-8 |postscript=.}}</ref> The mechanical advantage of a compound machine is simply the product of the mechanical advantages of the simple machines of which it is composed.
 
Various authors have compiled lists of simple machines and machine elements, sometimes lumping them together under a single term such as "simple machines",<ref name="Mechanicks"/> "basic machines",<ref name="Prater1994"/> "compound machines",<ref name="U_Virginia_elementary_curriculum"/> or "machine elements"; the use of the term "simple machines" in this broader [[word sense|sense]] is a departure from the neoclassical sense of the six essential simple machines, which is why many authors prefer to avoid its use, preferring the other terms (such as "machine element"). In all cases, the theme of an analytical and synthetic connection from simple to compound to complex is at work. A page from a 1728 text by Ephraim Chambers<ref name="Mechanicks"/> (in the figure to the right) shows more machine elements. By the late 1800s, [[Franz Reuleaux]]<ref name="Reuleaux1876">{{Citation |last=Reuleaux |first=F. |origyear=1876 |year=1963 |title=The kinematics of machinery (translated and annotated by A.B.W. Kennedy) |publisher=reprinted by Dover |location=New York, New York, USA |postscript=.}}</ref> identified hundreds of machine elements (calling them "simple machines"). Models of these devices can be found at  [[Cornell University]]'s KMODDL website.<ref name="KMODDL">{{Citation |author=Cornell University |authorlink=Cornell University |title=Reuleaux Collection of Mechanisms and Machines at Cornell University |url=http://kmoddl.library.cornell.edu/rx_collection.php |publisher=Cornell University |postscript=.}}</ref>
 
==History==
The idea of a "simple machine" originated with the Greek philosopher [[Archimedes]] around the 3rd century BC, who studied the "Archimedean" simple machines: lever, pulley, and  [[Screw (simple machine)|screw]].<ref name="Asimov1988"/><ref name="Chiu">{{Citation 
  | last = Chiu
  | first = Y. C.
  | authorlink =
  | coauthors =
  | title = An introduction to the History of Project Management
  | publisher = Eburon Academic Publishers
  | year = 2010
  | location = Delft
  | pages = 42
  | url = http://books.google.com/books?id=osNrPO3ivZoC&pg=PA42&dq=%22heron+of+alexandria%22++load+motion#v=onepage&q=%22heron%20of%20alexandria%22%20%20load%20motion&f=false
  | doi =
  | isbn = 90-5972-437-2}}</ref>  He discovered the principle of [[mechanical advantage]] in the lever.<ref>{{cite book
  |last=Ostdiek
  |first=Vern
  |coauthors=Bord, Donald
  |title=Inquiry into Physics
  |year=2005
  |publisher=Thompson Brooks/Cole
  |isbn=0-534-49168-5
  |url=http://books.google.com/books?id=7kz2pd14hPUC&pg=PA123
  |accessdate=2008-05-22
  |page=123}}</ref>  Later Greek philosophers defined the classic five simple machines (excluding the [[inclined plane]]) and were able to roughly calculate their mechanical advantage.<ref name="Usher">{{cite book 
  | last = Usher
  | first = Abbott Payson
  | authorlink =
  | coauthors =
  | title = A History of Mechanical Inventions
  | publisher = Courier Dover Publications
  | year = 1988
  | location = USA
  | pages = 98
  | url = http://books.google.com/books?id=xuDDqqa8FlwC&pg=PA196#v=snippet&q=wedge%20and%20screw&f=false
  | doi =
  | isbn = 0-486-25593-X}}</ref>  [[Heron of Alexandria]] (ca. 10–75 AD) in his work ''Mechanics'' lists five mechanisms that can "set a load in motion"; lever, windlass, pulley, wedge, and screw,<ref name="Chiu" /> and describes their fabrication and uses.<ref>{{cite conference
  | first = Viktor
  | last = Strizhak
  | coauthors = Igor Penkov, Toivo Pappel
  | title = Evolution of design, use, and strength calculations of screw threads and threaded joints
  | booktitle = HMM2004 International Symposium on History of Machines and Mechanisms
  | pages =
  | publisher = Kluwer Academic publishers
  | year = 2004
  | location =
  | url = http://books.google.com/books?id=FqZvlMnjqY0C&printsec=frontcover&dq=%22archimedean+simple+machine%22&source=gbs_summary_r&cad=0
  | doi =
  | id = ISBN 1-4020-2203-4
  | accessdate = 2008-05-21
  |page=245}}</ref>  However the Greeks' understanding was limited to the [[statics]] of simple machines; the balance of forces, and did not include [[Dynamics (mechanics)|dynamics]]; the tradeoff between force and distance, or the concept of [[Work (physics)|work]]. 
 
During the [[Renaissance]] the dynamics of the ''Mechanical Powers'', as the simple machines were called, began to be studied from the standpoint of how much useful work they could perform, leading eventually to the new concept of mechanical [[work (physics)|work]]. In 1586 Flemish engineer [[Simon Stevin]] derived the mechanical advantage of the inclined plane, and it was included with the other simple machines.  The complete dynamic theory of simple machines was worked out by Italian scientist [[Galileo Galilei]] in 1600 in ''Le Meccaniche'' ("On Mechanics").<ref name="Krebs">{{cite book
  |last=Krebs
  |first=Robert E.
  |title=Groundbreaking Experiments, Inventions, and Discoveries of the Middle Ages
  |year=2004
  |publisher=Greenwood Publishing Group
  |isbn=0-313-32433-6
  |url=http://books.google.com/books?id=MTXdplfiz-cC&pg=PA163&dq=%22mechanics+Galileo+analyzed%22#v=onepage&q=%22mechanics%20Galileo%20analyzed%22&f=false
  |accessdate=2008-05-21
  |page=163}}</ref><ref name="Stephen">{{cite book 
  | last = Stephen
  | first = Donald
  | authorlink =
  | coauthors = Lowell Cardwell
  | title = Wheels, clocks, and rockets: a history of technology
  | publisher = W. W. Norton & Company
  | year = 2001
  | location = USA
  | pages = 85–87
  | url = http://books.google.com/books?id=BSfpFLV1nkAC&pg=PA86&dq=%22simple+machine%22+galileo#v=onepage&q=%22simple%20machine%22%20galileo&f=false
  | doi =
  | isbn = 0-393-32175-4}}</ref>  He was the first to understand that simple machines do not create [[energy]], only transform it.<ref name="Krebs" />
 
The classic rules of sliding [[friction]] in machines were discovered by [[Leonardo da Vinci]] (1452–1519), but remained unpublished in his notebooks.  They were rediscovered by [[Guillaume Amontons]] (1699) and were further developed by [[Charles-Augustin de Coulomb]] (1785).<ref>{{cite book 
  | last = Armstrong-Hélouvry
  | first = Brian
  | authorlink =
  | coauthors =
  | title = Control of machines with friction
  | publisher = Springer
  | year = 1991
  | location = USA
  | pages = 10
  | url = http://books.google.com/books?id=0zk_zI3xACgC&pg=PA10&dq=friction+leonardo+da+vinci+amontons+coulomb#v=onepage&q=friction%20leonardo%20da%20vinci%20amontons%20coulomb&f=false
  | doi =
  | isbn = 0-7923-9133-0}}</ref>
<!-- I am commenting this section out because the references are not substantial and there is no question about what the Renaissance scientists considered to be simple machines.  I think this section is confusing to readers.
==Alternate definitions==
Any list of simple machines is somewhat arbitrary; the central idea is that every mechanism that manipulates force should be able to be understood as a combination of devices on the list.  Some variations that have been proposed to the classical list of six simple machines:
* Some exclude the wedge from the list of simple machines, as it is a moving inclined plane.<ref name="Asimov1988"/>
* The screw, being a [[helical]] inclined plane,<ref>[http://cnx.org/content/m13594/latest/ Simple machine elements: The screw is basically an inclined plane wrapped around a cylinder]</ref> is sometimes also excluded.<ref>{{cite book
  |last=Carhart
  |first=Henry S.
  |coauthors=Chute, Horatio N.
  |title=Physics with Applications
  |year=1917
  |publisher=Allyn & Bacom
  |pages=159–160
  |url=http://books.google.com/books?id=4T0AAAAAYAAJ&pg=RA1-PA160
  |accessdate=2008-05-20}}</ref>  This position is less accepted because a screw converts a rotational force ([[torque]]) to a linear force.
* It has been said that the pulley, and wheel and axle can be viewed as unique forms of levers, leaving only the lever and the inclined plane as simple machines from which all others can be derived.<ref>{{cite web
  |last=Isbell
  |first=Pam
  |title=Simple machines, or are they?
  |year=2001
  |work=Grade 5–7 lesson plan
  |publisher=2001 National Teacher Training Institute
  |url=http://www.myetv.org/education/ntti/lessons/2001_lessons/simplemachines.cfm
  |accessdate=2008-05-13}}</ref><ref name="Clute">{{cite book
  |last=Clute
  |first=Willard N.
  |title=Experimental General Science
  |year=1917
  |publisher=P. Blakiston's Son & Co.
  |location=Philadelphia
  |pages=188
  |url=http://books.google.com/books?id=OuFHAAAAIAAJ&pg=PA188
  |accessdate=2008-05-20}}</ref><ref name="BNET">{{cite web
  |title=Mechanical Advantage and Simple Machines
  |year=2002
  |work=BNET Business Network
  |publisher=CNET
  |url=http://findarticles.com/p/articles/mi_gx5226/is_2002/ai_n19143765/pg_1
  |accessdate=2008-05-21}}</ref><ref name="Beiser">{{cite book
  |last=Beiser
  |first=Arthur
  |year=2004
  |title=Schaum's Outline of Applied Physics
  |publisher=McGraw-Hill
  |url=http://books.google.com/books?id=soKguvJDgmsC&dq=Hydraulic+%22simple+machines%22&cad=0
  |isbn=0-07-142611-6
  |accessdate=2008-05-21
  |page=145}}</ref>
* [[Hydraulic]] systems can also provide amplification of force, so some say they should be added to the list.<ref name="BNET"/><ref>This was first suggested by [[Blaise Pascal]] in the 17th century: {{cite book
  |last=Meli
  |first=Domenico Bertolini
  |title=Thinking with Objects:The Transformation of Mechanics in the 17th Century
  |year=2006
  |publisher=JHU Press
  |isbn=0-8018-8427-6
  |url=http://books.google.com/books?id=qbS_0qAB3_cC&dq=Hydraulic+%22simple+machines%22&cad=0}} p.175</ref><ref>{{cite web
  |title=Mechanical Advantage - Simple Machines
  |work=MCAT Exam preparation
  |date=January 7, 2008
  |publisher=Eduturca
  |url=http://www.eduturca.com/mcat-exam/mechanical-advantage-simple-machines-mcat.html
  |accessdate=2008-05-21}}</ref>
-->
 
==Mechanical advantage==
A simple machine has an applied force that [[Mechanical work|work]]s against a load force.  If there are no [[friction]] losses, the work done on the load is equal to the work done by the applied force.  This allows an increase in the output force at the cost of a proportional decrease in the distance moved by the load.  The ratio of the output force to the input force is the [[mechanical advantage]] of the machine.
 
If the simple machine does not dissipate or absorb energy, then its mechanical advantage can be calculated from the machine's geometry.  For example, the mechanical advantage of a [[lever]] is equal to the ratio of its [[lever arm]]s.  A simple machine with no [[friction]] or [[Elasticity (physics)|elasticity]] is often called an ''[[ideal machine]]''.<ref name="Uicker2003">{{Citation |first=John J. |last=Uicker, Jr. |first2=Gordon R. |last2=Pennock |first3=Joseph E. |last3=Shigley |year=2003 |title=Theory of Machines and Mechanisms |edition=third |publisher=Oxford University Press |location=New York |isbn=978-0-19-515598-3 |doi= }}</ref><ref>{{Citation |first=Burton |last=Paul |year=1979 |title=Kinematics and Dynamics of Planar Machinery |publisher=Prentice Hall |isbn=978-0-13-516062-6 |doi= }}</ref>
 
For an ideal simple machine the rate of energy in, or [[power (physics)|power]] in, equals the rate of energy out, or power out, that is
:<math>P_{in} =  P_{out}.\!</math>
 
Because [[power (physics)|power]] is the product of a force and the velocity of its point of application, the applied force times the velocity the input point moves, ''v<sub>in</sub>'', must be equal to the load force times the velocity the load moves, ''v<sub>out</sub>'', given by
:<math>F_{in}v_{in} = F_{out}v_{out}.\,</math>
 
So the ratio of output to input force, the [[mechanical advantage]], of a frictionless machine is equal to the "''velocity ratio''"; the ratio of input velocity to output velocity:
:<math>MA = \frac{F_{out}}{F_{in}} = \frac{v_{in}}{v_{out}} \,</math> &nbsp;&nbsp;&nbsp;&nbsp;  (Ideal Mechanical Advantage)
 
In the [[screw (simple machine)|screw]], which uses rotational motion, the input force should be replaced by the [[torque]], and the velocity by the angular velocity the shaft is turned.
 
==Compound machine==
A ''compound machine'' is a [[machine (mechanical)|machine]] formed from a set of simple machines connected in series with the output force of one providing the input force to the next.  For example a [[Vise|bench vise]] consists of a lever (the vise's handle) in series with a screw, and a simple [[gear train]] consists of a number of [[gear]]s ([[Wheel and axle|wheels and axles]]) connected in series. 
 
The mechanical advantage of a compound machine is the ratio of the output force exerted by the last machine in the series divided by the input force applied to the first machine, that is
:<math>\mathrm{MA}_{compound}  =  \frac {F_{\mathrm{out} n}} {F_{\mathrm{in} 1}}.  \,</math>
 
Because the output force of each machine is the input of the next, <math>F_{out 1}=F_{in 2} \,</math> and <math> F_{out k} =F_{in k+1} \,</math>, this mechanical advantage is also given by,
:<math>\mathrm{MA}_{compound}  =  \frac {F_{out 1}} {F_{in 1}} \frac {F_{out 2}} {F_{in 2}} \ldots\frac {F_{out n}} {F_{in n}}.  \,</math>
Thus, the mechanical advantage of the compound machine is equal to the product of the mechanical advantages of the series of simple machines that form it,
:<math>\mathrm{MA}_{compound}  =    \mathrm{MA}_1 \mathrm{MA}_2 \ldots\mathrm{MA}_n  \,</math>
 
==Energy losses and efficiency==
Machines lose energy through friction, deformation and wear, which is dissipated as heat.  This means the power out of the machine is less than power in.  The ratio of power out to power in is the [[Mechanical efficiency|efficiency]] η of the machine, and is a measure of the energy losses,
 
:<math>\eta = \frac{P_{out}}{P_{in}}. \, </math>
 
The velocity ratio of a machine is fixed by its dimensions, so it is the mechanical advantage that is reduced by the losses, that is
:<math>MA = \frac{F_{out}}{F_{in}} = \eta \frac{v_{in}}{v_{out}}.</math>
 
So in non-ideal machines, the mechanical advantage is always less than the velocity ratio by the product with the efficiency ''η''.  So a machine that includes losses such as friction, deformation and wear, will not be able to move as large a load as a corresponding ideal machine using the same input force.
 
The efficiency of a compound machine is the product of the efficiencies of the series of simple machines that form it,
:<math>\eta_{compound} = \eta_1  \eta_2 \ldots \eta_n.\,</math>
 
==Kinematic chains==
[[File:Kinematics of Machinery - Figure 21.jpg|thumb|right|200px|alt=Illustration of a Four-bar linkage from Kinematics of Machinery, 1876|Illustration of a four-bar linkage from [http://en.wikisource.org/wiki/The_Kinematics_of_Machinery Kinematics of Machinery, 1876]]]Simple machines are elementary examples of [[kinematic chain]]s that are used to model [[mechanical systems]] ranging from the steam engine to robot manipulators.  The bearings that form the fulcrum of a lever and that allow the wheel and axle and pulleys to rotate are examples of a [[kinematic pair]] called a hinged joint.  Similarly, the flat surface of an inclined plane and wedge are examples of the [[kinematic pair]] called a sliding joint.  The screw is usually identified as its own kinematic pair called a helical joint.
 
Two levers, or cranks, are combined into a planar [[four-bar linkage]] by attaching a link that connects the output of one crank to the input of another.  Additional links can be attached to form a [[six-bar linkage]] or in series to form a robot.<ref name="Uicker2003"/>
 
<!-- This section on self-locking applies to the inclined plane, wedge and screw but uses a general approach rather than a direct analysis.  I recommend that a direct analysis be provided in the articles on each of these devices.
==Self-locking machines==
In many simple machines, if the load force ''F<sub>out</sub>'' on the machine is high enough in relation to the input force  ''F<sub>in</sub>'', the machine will move backwards, with the load force doing work on the input force.<ref name="Gujral2">{{cite book 
  | last = Gujral
  | first = I.S.
  | authorlink =
  | coauthors =
  | title = Engineering Mechanics
  | publisher = Firewall Media
  | year = 2005
  | location =
  | pages = 382
  | url = http://books.google.com/books?id=JM0OG-XUyu0C&pg=PA382&dq=%22simple+machine%22+self-locking#v=onepage&q=%22simple%20machine%22%20self-locking&f=false
  | doi =
  | isbn = 81-7008-636-1}}</ref>  So these machines can be used in either direction, with the driving force applied to either input point.  For example, if the load force on a lever is high enough, the lever will move backwards, moving the input arm backwards against the input force.  These are called "''reversible''", "''non-locking''" or "''overhauling''"  machines, and the backward motion is called "''overhauling''".  However in some machines, if the frictional forces are high enough, no amount of load force can move it backwards, even if the input force is zero.  This is called a "''self-locking''", "''nonreversible''", or "''non-overhauling''" machine.<ref name="Gujral2" />  These machines can only be set in motion by a force at the input, and when the input force is removed will remain motionless, "locked" by friction at whatever position they were left.
 
Self-locking occurs mainly in those machines which have large areas of sliding contact and therefore large frictional losses: the  [[screw (simple machine)|screw]],  [[inclined plane]], and [[wedge (mechanical device)|wedge]]:
*The most common example is a screw.  In most screws, applying torque to the shaft can cause it to turn, moving the shaft linearly to do work against a load, but no amount of axial load force against the shaft will cause it to turn backwards.
*In an inclined plane, a load can be pulled up the plane by a sideways input force, but if the plane is not too steep and there is enough friction between load and plane, when the input force is removed the load will remain motionless and will not slide down the plane, regardless of its weight.
*A wedge can be driven into a block of wood by force on the end, such as from hitting it with a sledge hammer, forcing the sides apart, but no amount of compression force from the wood walls will cause it to pop back out of the block.
A machine will be self-locking if and only if its efficiency ''η'' is below 50%:<ref name="Gujral2" /> 
 
:<math>\eta \equiv \frac {F_{out}/F_{in} }{d_{in}/d_{out} } < 0.50  \,</math>
 
Whether a machine is self-locking depends on both the friction forces ([[Coefficient of friction|coefficient of static friction]]) between its parts, and the distance ratio ''d<sub>in</sub>/d<sub>out</sub>'' (ideal mechanical advantage).  If both the friction and ideal mechanical advantage are high enough, it will self-lock.
 
===Derivation===
When a machine moves in the forward direction from point 1 to point 2, with the input force doing work on a load force,  from conservation of energy<ref name="Rao">{{cite book 
  | last = Rao
  | first = S. 
  | authorlink =
  | coauthors = R. Durgaiah
  | title = Engineering Mechanics
  | publisher = Universities Press
  | year = 2005
  | location =
  | pages = 82
  | url = http://books.google.com/books?id=vRR4FKAkJl4C&pg=PA80&dq=%22simple+machine%22+%22mechanical+advantage%22#v=onepage&q=%22simple%20machine%22%20%22&f=false
  | doi =
  | isbn = 81-7371-543-2}}</ref><ref name="Goyal">{{cite book 
  | last = Goyal
  | first = M. C.
  | authorlink =
  | coauthors = G. S. Raghuvanshi
  | title = Engineering Mechanics
  | publisher = PHI Learning Private Ltd.
  | year = 2009
  | location = New Delhi
  | pages = 202
  | url = http://books.google.com/books?id=vRR4FKAkJl4C&pg=PA82#v=onepage&q&f=false
  | doi =
  | isbn = 81-203-3789-1}}</ref>
:<math>W_{i1,2} = W_{load} + W_{fric} \qquad \qquad  (1)\,</math>
When it moves backward from point 2 to point 1 with the load force doing work on the input force, the work lost to friction ''W<sub>fric</sub>'' is the same
:<math>W_{load} = W_{i2,1} + W_{fric} \,</math>
When the input force is removed, the machine will self-lock if the work dissipated in friction is greater than the work done by the load force moving it backwards
:<math>W_{load} < W_{fric} \,</math>
From (1)
:<math>W_{load} < W_{i1,2} - W_{load} \,</math>
 
:<math>2W_{load} < W_{i1,2} \,</math>
 
:<math>\eta \equiv \frac {W_{load}}{W_{i1,2}} < \frac {1}{2}  \,</math>
-->
==Classification of machines==
The identification of simple machines arises from a desire for a systematic method to invent new machines.  Therefore, an important concern is how simple machines are combined to make more complex machines.  One approach is to attach simple machines in series to obtain compound machines. 
 
However, a more successful strategy was identified by [[Franz Reuleaux]], who collected and studied over 800 elementary machines.  He realized that a lever, pulley, and wheel and axle are in essence the same device: a body rotating about a hinge. Similarly, an inclined plane, wedge, and screw are a block sliding on a flat surface.<ref>Hartenberg, R.S. & J. Denavit (1964) [http://kmoddl.library.cornell.edu/bib.php?m=23 Kinematic synthesis of linkages], New York: McGraw-Hill, online link from [[Cornell University]].</ref> 
 
This realization shows that it is the joints, or the connections that provide movement, that are the primary elements of a machine.  Starting with four types of joints, the [[revolute joint]], [[prismatic joint|sliding joint]], [[cam|cam joint]] and [[gear train|gear joint]], and related connections such as cables and belts, it is possible to understand a machine as an assembly of solid parts that connect these joints.<ref name="Uicker2003"/>
 
==See also==
* [[Machine (mechanical)]]
* [[Mechanism (engineering)]]
* [[Linkage (mechanical)]]
* [[Four-bar linkage]]
* [[Six-bar linkage]]
* [[Gear train]]
* [[Power (physics)]]
 
==References==
{{Reflist|30em}}
 
{{Machines}}
 
{{DEFAULTSORT:Simple Machine}}
[[Category:Mechanical engineering]]
[[Category:Simple machines| ]]

Revision as of 17:22, 16 January 2014

29 yr old Orthopaedic Surgeon Grippo from Saint-Paul, spends time with interests including model railways, top property developers in singapore developers in singapore and dolls. Finished a cruise ship experience that included passing by Runic Stones and Church.

Table of simple mechanisms, from Chambers' Cyclopedia, 1728.[1] Simple machines provide a "vocabulary" for understanding more complex machines.

A simple machine is a non-motorized device that changes the direction or magnitude of a force.[2] In general, a simple machine can be defined as one of the simplest mechanisms that provide mechanical advantage (also called leverage).[3]

Usually the term refers to the six classical simple machines which were defined by Renaissance scientists:[4]

A simple machine is an elementary device that has a specific movement (often called a mechanism), which can be combined with other devices and movements to form a machine. Thus simple machines are considered to be the "building blocks" of more complicated machines. This analytical view of machines as decomposable into simple machines first arose in the Renaissance as a neoclassical amplification of ancient Greek texts on technology,[5] and is still a central part of engineering in today's age of applied science. For example, wheels, levers, and pulleys are all used in the mechanism of a bicycle.[6][7] Between the simple machines and complex assemblies, several intermediate classes can be defined, which may be termed "compound machines"[8][3][9] or "machine elements".[10] The mechanical advantage of a compound machine is simply the product of the mechanical advantages of the simple machines of which it is composed.

Various authors have compiled lists of simple machines and machine elements, sometimes lumping them together under a single term such as "simple machines",[1] "basic machines",[6] "compound machines",[8] or "machine elements"; the use of the term "simple machines" in this broader sense is a departure from the neoclassical sense of the six essential simple machines, which is why many authors prefer to avoid its use, preferring the other terms (such as "machine element"). In all cases, the theme of an analytical and synthetic connection from simple to compound to complex is at work. A page from a 1728 text by Ephraim Chambers[1] (in the figure to the right) shows more machine elements. By the late 1800s, Franz Reuleaux[11] identified hundreds of machine elements (calling them "simple machines"). Models of these devices can be found at Cornell University's KMODDL website.[12]

History

The idea of a "simple machine" originated with the Greek philosopher Archimedes around the 3rd century BC, who studied the "Archimedean" simple machines: lever, pulley, and screw.[3][13] He discovered the principle of mechanical advantage in the lever.[14] Later Greek philosophers defined the classic five simple machines (excluding the inclined plane) and were able to roughly calculate their mechanical advantage.[5] Heron of Alexandria (ca. 10–75 AD) in his work Mechanics lists five mechanisms that can "set a load in motion"; lever, windlass, pulley, wedge, and screw,[13] and describes their fabrication and uses.[15] However the Greeks' understanding was limited to the statics of simple machines; the balance of forces, and did not include dynamics; the tradeoff between force and distance, or the concept of work.

During the Renaissance the dynamics of the Mechanical Powers, as the simple machines were called, began to be studied from the standpoint of how much useful work they could perform, leading eventually to the new concept of mechanical work. In 1586 Flemish engineer Simon Stevin derived the mechanical advantage of the inclined plane, and it was included with the other simple machines. The complete dynamic theory of simple machines was worked out by Italian scientist Galileo Galilei in 1600 in Le Meccaniche ("On Mechanics").[16][17] He was the first to understand that simple machines do not create energy, only transform it.[16]

The classic rules of sliding friction in machines were discovered by Leonardo da Vinci (1452–1519), but remained unpublished in his notebooks. They were rediscovered by Guillaume Amontons (1699) and were further developed by Charles-Augustin de Coulomb (1785).[18]

Mechanical advantage

A simple machine has an applied force that works against a load force. If there are no friction losses, the work done on the load is equal to the work done by the applied force. This allows an increase in the output force at the cost of a proportional decrease in the distance moved by the load. The ratio of the output force to the input force is the mechanical advantage of the machine.

If the simple machine does not dissipate or absorb energy, then its mechanical advantage can be calculated from the machine's geometry. For example, the mechanical advantage of a lever is equal to the ratio of its lever arms. A simple machine with no friction or elasticity is often called an ideal machine.[19][20]

For an ideal simple machine the rate of energy in, or power in, equals the rate of energy out, or power out, that is

Because power is the product of a force and the velocity of its point of application, the applied force times the velocity the input point moves, vin, must be equal to the load force times the velocity the load moves, vout, given by

So the ratio of output to input force, the mechanical advantage, of a frictionless machine is equal to the "velocity ratio"; the ratio of input velocity to output velocity:

     (Ideal Mechanical Advantage)

In the screw, which uses rotational motion, the input force should be replaced by the torque, and the velocity by the angular velocity the shaft is turned.

Compound machine

A compound machine is a machine formed from a set of simple machines connected in series with the output force of one providing the input force to the next. For example a bench vise consists of a lever (the vise's handle) in series with a screw, and a simple gear train consists of a number of gears (wheels and axles) connected in series.

The mechanical advantage of a compound machine is the ratio of the output force exerted by the last machine in the series divided by the input force applied to the first machine, that is

Because the output force of each machine is the input of the next, and , this mechanical advantage is also given by,

Thus, the mechanical advantage of the compound machine is equal to the product of the mechanical advantages of the series of simple machines that form it,

Energy losses and efficiency

Machines lose energy through friction, deformation and wear, which is dissipated as heat. This means the power out of the machine is less than power in. The ratio of power out to power in is the efficiency η of the machine, and is a measure of the energy losses,

The velocity ratio of a machine is fixed by its dimensions, so it is the mechanical advantage that is reduced by the losses, that is

So in non-ideal machines, the mechanical advantage is always less than the velocity ratio by the product with the efficiency η. So a machine that includes losses such as friction, deformation and wear, will not be able to move as large a load as a corresponding ideal machine using the same input force.

The efficiency of a compound machine is the product of the efficiencies of the series of simple machines that form it,

Kinematic chains

Illustration of a Four-bar linkage from Kinematics of Machinery, 1876
Illustration of a four-bar linkage from Kinematics of Machinery, 1876

Simple machines are elementary examples of kinematic chains that are used to model mechanical systems ranging from the steam engine to robot manipulators. The bearings that form the fulcrum of a lever and that allow the wheel and axle and pulleys to rotate are examples of a kinematic pair called a hinged joint. Similarly, the flat surface of an inclined plane and wedge are examples of the kinematic pair called a sliding joint. The screw is usually identified as its own kinematic pair called a helical joint.

Two levers, or cranks, are combined into a planar four-bar linkage by attaching a link that connects the output of one crank to the input of another. Additional links can be attached to form a six-bar linkage or in series to form a robot.[19]

Classification of machines

The identification of simple machines arises from a desire for a systematic method to invent new machines. Therefore, an important concern is how simple machines are combined to make more complex machines. One approach is to attach simple machines in series to obtain compound machines.

However, a more successful strategy was identified by Franz Reuleaux, who collected and studied over 800 elementary machines. He realized that a lever, pulley, and wheel and axle are in essence the same device: a body rotating about a hinge. Similarly, an inclined plane, wedge, and screw are a block sliding on a flat surface.[21]

This realization shows that it is the joints, or the connections that provide movement, that are the primary elements of a machine. Starting with four types of joints, the revolute joint, sliding joint, cam joint and gear joint, and related connections such as cables and belts, it is possible to understand a machine as an assembly of solid parts that connect these joints.[19]

See also

References

43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.

Template:Machines

  1. 1.0 1.1 1.2 Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

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  2. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

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  3. 3.0 3.1 3.2 Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

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    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

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    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

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    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  7. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  8. 8.0 8.1 Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  9. 55 years old Systems Administrator Antony from Clarence Creek, really loves learning, PC Software and aerobics. Likes to travel and was inspired after making a journey to Historic Ensemble of the Potala Palace.

    You can view that web-site... ccleaner free download
  10. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  11. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  12. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  13. 13.0 13.1 Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  14. 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.

    My blog: http://www.primaboinca.com/view_profile.php?userid=5889534
  15. 55 years old Systems Administrator Antony from Clarence Creek, really loves learning, PC Software and aerobics. Likes to travel and was inspired after making a journey to Historic Ensemble of the Potala Palace.

    You can view that web-site... ccleaner free download
  16. 16.0 16.1 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.

    My blog: http://www.primaboinca.com/view_profile.php?userid=5889534
  17. 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.

    My blog: http://www.primaboinca.com/view_profile.php?userid=5889534
  18. 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.

    My blog: http://www.primaboinca.com/view_profile.php?userid=5889534
  19. 19.0 19.1 19.2 Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  20. Many property agents need to declare for the PIC grant in Singapore. However, not all of them know find out how to do the correct process for getting this PIC scheme from the IRAS. There are a number of steps that you need to do before your software can be approved.

    Naturally, you will have to pay a safety deposit and that is usually one month rent for annually of the settlement. That is the place your good religion deposit will likely be taken into account and will kind part or all of your security deposit. Anticipate to have a proportionate amount deducted out of your deposit if something is discovered to be damaged if you move out. It's best to you'll want to test the inventory drawn up by the owner, which can detail all objects in the property and their condition. If you happen to fail to notice any harm not already mentioned within the inventory before transferring in, you danger having to pay for it yourself.

    In case you are in search of an actual estate or Singapore property agent on-line, you simply should belief your intuition. It's because you do not know which agent is nice and which agent will not be. Carry out research on several brokers by looking out the internet. As soon as if you end up positive that a selected agent is dependable and reliable, you can choose to utilize his partnerise in finding you a home in Singapore. Most of the time, a property agent is taken into account to be good if he or she locations the contact data on his website. This may mean that the agent does not mind you calling them and asking them any questions relating to new properties in singapore in Singapore. After chatting with them you too can see them in their office after taking an appointment.

    Have handed an trade examination i.e Widespread Examination for House Brokers (CEHA) or Actual Property Agency (REA) examination, or equal; Exclusive brokers are extra keen to share listing information thus making certain the widest doable coverage inside the real estate community via Multiple Listings and Networking. Accepting a severe provide is simpler since your agent is totally conscious of all advertising activity related with your property. This reduces your having to check with a number of agents for some other offers. Price control is easily achieved. Paint work in good restore-discuss with your Property Marketing consultant if main works are still to be done. Softening in residential property prices proceed, led by 2.8 per cent decline within the index for Remainder of Central Region

    Once you place down the one per cent choice price to carry down a non-public property, it's important to accept its situation as it is whenever you move in – faulty air-con, choked rest room and all. Get round this by asking your agent to incorporate a ultimate inspection clause within the possibility-to-buy letter. HDB flat patrons routinely take pleasure in this security net. "There's a ultimate inspection of the property two days before the completion of all HDB transactions. If the air-con is defective, you can request the seller to repair it," says Kelvin.

    15.6.1 As the agent is an intermediary, generally, as soon as the principal and third party are introduced right into a contractual relationship, the agent drops out of the image, subject to any problems with remuneration or indemnification that he could have against the principal, and extra exceptionally, against the third occasion. Generally, agents are entitled to be indemnified for all liabilities reasonably incurred within the execution of the brokers´ authority.

    To achieve the very best outcomes, you must be always updated on market situations, including past transaction information and reliable projections. You could review and examine comparable homes that are currently available in the market, especially these which have been sold or not bought up to now six months. You'll be able to see a pattern of such report by clicking here It's essential to defend yourself in opposition to unscrupulous patrons. They are often very skilled in using highly unethical and manipulative techniques to try and lure you into a lure. That you must also protect your self, your loved ones, and personal belongings as you'll be serving many strangers in your home. Sign a listing itemizing of all of the objects provided by the proprietor, together with their situation. HSR Prime Recruiter 2010
  21. Hartenberg, R.S. & J. Denavit (1964) Kinematic synthesis of linkages, New York: McGraw-Hill, online link from Cornell University.