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| {{distinguish2|[[Newton scale]], a rarely used non-SI temperature scale}}
| | The Swann DVR-2600 is obtainable with 4, 8 or 16 BNC video connections suggesting you have an alternative of either a 4, 8 or 16 camera DVR. There are three primary ways to use CCTV cctv dvr reviews 2012 systems, skillfully developed say: as being a deterrent, for forensic purposes and being an introductive device. Cctv dvr user guide As it is possible to view the Swann DVR also comes 16 camera [http://eduardovalencia.no-ip.org/innova/wiki/index.php/4_Lies_Honeywell_Video_Systems_Rapid_Eyes_Tell dvr card] in countless different models capable of meeting merely in relation to every [http://cies.xrea.jp/jump/?http://cctvdvrreviews.com cctv dvr email alert] demand feasible.<br><br> |
| {{Use British English|date=January 2012}}
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| | bgcolour =
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| | name = Newton
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| | image =
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| | caption =
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| | standard = [[SI derived unit]]
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| | quantity = [[Force]]
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| | symbol = N
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| | dimension = M⋅L⋅T<sup>−2</sup>
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| | namedafter = [[Sir Isaac Newton]]
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| | extralabel = In [[SI base unit]]s:
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| | extradata = 1 N = 1 [[kilogram|kg]]·[[metre|m]]/[[second|s]]<sup>2</sup>
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| }}
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| The '''newton''' (symbol: '''N''') is the [[International System of Units]] (SI) [[SI derived unit|derived unit]] of [[force]]. It is named after [[Isaac Newton]] in recognition of his work on [[classical mechanics]], specifically [[Newton's laws of motion#Newton's second law|Newton's second law of motion]].
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| ==Definition==
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| In 1946, [[Conférence Générale des Poids et Mesures]] (CGPM) resolution 2 standardized the unit of force in the [[MKS system of units]] to be the amount needed to accelerate 1 [[kilogram]] of mass at the rate of 1 [[metre per second squared]]. The 9th CGPM, held in 1948, then adopted the name "newton" for this unit in resolution 7.<ref name="ISU1977"/> This name honors the English physicist and mathematician [[Isaac Newton]], who laid the foundations for most of [[classical mechanics]]. The newton thus became the standard unit of force in [[le Système International d'Unités]] (SI), or [[International System of Units]].
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| [[Newton's laws of motion|Newton's second law of motion]] states that {{math|1=''F'' = ''ma''}}, where ''F'' is the force applied, ''m'' is the mass of the object receiving the force, and ''a'' is the acceleration of the object. The newton is therefore:<ref>{{cite web|title = Table 3. Coherent derived units in the SI with special names and symbols | work = The International System of Units (SI) | publisher = [[International Bureau of Weights and Measures]] | year = 2006 | url = http://www.bipm.org/en/si/si_brochure/chapter2/2-2/table3.html}}</ref>
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| :<math>{1~{\rm N} = 1~{\rm kg} \frac{{\rm m}} {{\rm s}^2}}</math> | |
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| where the following symbols are used for the units:
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| : N: newton
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| : kg: [[kilogram]]
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| : m: [[metre]]
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| : s: [[second]].
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| In [[dimensional analysis]]:
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| :<math>{\mathsf F} = \frac{\mathsf {ML}} {{\mathsf T}^2}</math>
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| where
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| : '''M''': mass
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| : '''L''': length
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| : '''T''': time.
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| {{SI unit lowercase|Isaac Newton|newton|N}}
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| ==Examples==
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| *1 N is the force of [[Earth's gravity]] on a mass of about 102 g = ({{frac|1|[[Standard gravity|9.81]]}} kg).
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| *On Earth's surface, a mass of 1 kg exerts a force of approximately 9.81 N [down] (or 1.0 [[kilogram-force]]; 1 kgf = 9.80665 N by definition). The approximation of 1 kgf corresponding to 10 N (1 [[deca-|decanewton]] or daN) is sometimes used as a rule of thumb in everyday life and in engineering.
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| *The force of Earth's gravity on (= the [[weight]] of) a human being with a mass of 70 kg is approximately 686 N.
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| *The [[dot product]] of force and distance is [[mechanical work]]. Thus, in SI units, a force of 1 N exerted over a distance of 1 m is 1 N·m of work. The [[Mechanical work|Work-Energy Theorem]] states that the work done on a body is equal to the change in energy of the body. 1 N·m = 1 J ([[joule]]), the SI unit of energy.
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| *It is common to see forces expressed in kilonewtons or kN, where 1 kN = 1,000 N. See [[SI prefix]].
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| ==Common use of kilonewtons in construction==
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| Kilonewtons are often used for stating safety holding values of [[fasteners]], [[Earth anchor|anchors]], and more in the [[Construction|building]] industry. They are also often used in the specifications for [[rock climbing]] equipment. The safe working loads in both [[Tension (physics)|tension]] and [[Shear stress|shear]] measurements can be stated in kilonewtons. Injection moulding machines, used to manufacture plastic parts, are classed by kilonewton (i.e., the amount of clamping force they apply to the mould).
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| On the Earth's surface, 1 kN is about 101.97162 kilogram-force of load, so multiplying the kilonewton value by 100 (i.e. using a slightly conservative and easier to calculate value) is a good rule of thumb.<ref>http://www.convertunits.com/from/kilonewtons/to/kilograms-force</ref>
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| ==Conversion factors==
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| {{Units of force}}
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| {{GravEngAbs}}
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| ==See also==
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| {{div col|2}}
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| * [[Force gauge]]
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| * [[International System of Units]] (SI)
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| * [[Joule]], SI unit of [[energy]], 1 newton exerted over a distance of 1 metre
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| * [[Kilogram-force]], force exerted by Earth's gravity at sea level on one kilogram of mass
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| * [[Kip (unit)]]
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| * [[Pascal (unit)|Pascal]], SI unit of [[pressure]], 1 newton acting on an area of 1 [[square metre]]
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| * [[Orders of magnitude (force)]]
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| * [[Pound (force)]]
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| * [[Sthène]]
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| {{div col end}}
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| == Notes and references ==
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| {{Reflist|2|refs=
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| <ref name="ISU1977">{{Citation
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| | author = International Bureau of Weights and Measures
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| | title = The international system of units
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| | issue = 330–331
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| | edition = 3rd
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| | publisher = U.S. Dept. of Commerce, National Bureau of Standards
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| | page = 17
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| | year = 1977
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| | isbn = 0745649742
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| | url = http://books.google.com/books?id=YvZNdSdeCnEC&pg=PA17
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| | postscript= .
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| }}</ref>
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| }}
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| {{SI units}}
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| [[Category:Units of force]]
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| [[Category:SI derived units]]
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