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The '''slug''' is a unit of [[mass]] associated with [[Imperial units]]. It is a mass that accelerates by 1 ft/s<sup>2</sup> when a force of one [[pound-force]] ({{lbf}}) is exerted on it. | |||
<math>1\,\text{slug} =1\,\frac{\text{lb}_F\cdot\text{s}^2}{\text{ft}} | |||
\qquad\Longleftrightarrow\qquad | |||
1\,\text{lb}_F = 1\,\frac{\text{slug}\cdot\text{ft}}{\text{s}^2}</math> | |||
One slug has a mass of {{val|32.17405|u=lbm}} or {{val|14.593903|u=kg}} based on [[standard gravity]], the [[Foot (unit)#International_foot|international foot]], and the [[Pound (mass)#Avoirdupois_pound|avoirdupois pound]].<ref name=Shigley>Shigley, Joseph E. and Mischke, Charles R. ''Mechanical Engineering Design'', Sixth ed, pp. 31–33. McGraw Hill, 2001. ISBN 0-07-365939-8.</ref> At the surface of the Earth, an object with a mass of 1 slug exerts a force of about {{val|32.17|u=lbf}} or {{val|143|u=N}}.<ref>Beckwith, Thomas G., Roy D. Marangoni, et al. ''Mechanical Measurements'', Fifth ed, pp. 34-36. Addison-Wesley Publishing, 1993. ISBN 0-201-56947-7.</ref><ref name=Shevell>Shevell, R.S. ''Fundamentals of Flight'', Second ed, p. xix. Prentice-Hall, 1989.</ref> | |||
== History == | |||
The ''slug'' is part of a subset of units known as the [[foot-pound-second system#force|gravitational FPS system]], one of several such specialized systems of mechanical units developed in the late 19th and the 20th century. ''Geepound'' was another name for this unit in early literature.<ref>[http://www.unit2unit.eu/lb_gee.html ]. unit2unit.eu</ref> | |||
The name "slug" was coined before 1900 by British physicist [[Arthur Mason Worthington]],<ref>{{cite book |author = Worthington, Arthur Mason |title = Dynamics of Rotation: An Elementary Introduction to Rigid Dynamics |publisher = Longmans, Green, and Co. |year = 1900 |edition = 3rd |page = 9 |url = http://www.archive.org/stream/dynamicsofrotati00wortuoft#page/8/mode/2up}}</ref> but it did not see any significant use until decades later. A 1928 textbook says: {{quote|text=No name has yet been given to the unit of mass and, in fact, as we have developed the theory of dynamics no name is necessary. Whenever the mass, ''m'', appears in our formulae, we substitute the ratio of the convenient force-acceleration pair ''(w/g)'', and measure the mass in lbs. per ft./sec.<sup>2</sup> or in grams per cm./sec.<sup>2</sup>.|source=Noel Charlton Little, ''College Physics'', Charles Scribner’s Sons, 1928, p. 165.}} | |||
{{GravEngAbs}} | |||
The slug is listed in the "Regulations under the Weights and Measures (National Standards) Act, 1960". This regulation defines the units of weights and measures, both regular and metric, in Australia. | |||
== Similar units == | |||
The ''blob'' is the [[inch]] version of the slug (1 blob = 1 lb<sub>f</sub>·s<sup>2</sup>/in = 12 slugs)<ref name=Shigley/> or equivalent to 175.126 kg. This unit is also called ''slinch'' (a [[portmanteau]] of the words slug and inch).<ref>[http://www.diracdelta.co.uk/science/source/s/l/slug/source.html Slug]. DiracDelta Science & Engineering Encyclopedia </ref><ref name=Wolframblob>{{cite web |title=1 blob |url=http://www.wolframalpha.com/input/?i=1+blob&lk=1 |work=Wolfram Alpha Computational Knowledge Engine |accessdate=27 October 2011}}</ref> Slang terms include ''slugette'',<ref>Celmer, Robert. ''Notes to Accompany Vibrations II''. Version 2.2. 2009.</ref> and a ''snail''.<ref>[http://www.unc.edu/~rowlett/units/dictS.html]</ref> | |||
Metric units include the "glug" in the [[centimetre-gram-second system]], and the "mug", "par", or "MTE" in the [[metre-kilogram-second system]].<ref>{{cite book |last=Cardarelli |first=François |title=Scientific Units, Weights and Measures |pages=358, 377 |year=1999 |publisher=Springer |isbn=1-85233-682-X}}</ref> | |||
== References == | |||
{{Reflist|1}} | |||
==External links== | |||
* [http://hyperphysics.phy-astr.gsu.edu/hbase/mechanics/slug.html "What is a Slug?" on phy-astr.gsu.edu] | |||
[[Category:Imperial units]] | |||
[[Category:Units of mass]] |
Revision as of 15:35, 7 March 2013
The slug is a unit of mass associated with Imperial units. It is a mass that accelerates by 1 ft/s2 when a force of one pound-force (Template:Lbf) is exerted on it.
One slug has a mass of Template:Val or Template:Val based on standard gravity, the international foot, and the avoirdupois pound.[1] At the surface of the Earth, an object with a mass of 1 slug exerts a force of about Template:Val or Template:Val.[2][3]
History
The slug is part of a subset of units known as the gravitational FPS system, one of several such specialized systems of mechanical units developed in the late 19th and the 20th century. Geepound was another name for this unit in early literature.[4]
The name "slug" was coined before 1900 by British physicist Arthur Mason Worthington,[5] but it did not see any significant use until decades later. A 1928 textbook says: 31 year-old Systems Analyst Bud from Deep River, spends time with pursuits for instance r/c cars, property developers new condo in singapore singapore and books. Last month just traveled to Orkhon Valley Cultural Landscape.
The slug is listed in the "Regulations under the Weights and Measures (National Standards) Act, 1960". This regulation defines the units of weights and measures, both regular and metric, in Australia.
Similar units
The blob is the inch version of the slug (1 blob = 1 lbf·s2/in = 12 slugs)[1] or equivalent to 175.126 kg. This unit is also called slinch (a portmanteau of the words slug and inch).[6][7] Slang terms include slugette,[8] and a snail.[9]
Metric units include the "glug" in the centimetre-gram-second system, and the "mug", "par", or "MTE" in the metre-kilogram-second system.[10]
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.
External links
- ↑ 1.0 1.1 Shigley, Joseph E. and Mischke, Charles R. Mechanical Engineering Design, Sixth ed, pp. 31–33. McGraw Hill, 2001. ISBN 0-07-365939-8.
- ↑ Beckwith, Thomas G., Roy D. Marangoni, et al. Mechanical Measurements, Fifth ed, pp. 34-36. Addison-Wesley Publishing, 1993. ISBN 0-201-56947-7.
- ↑ Shevell, R.S. Fundamentals of Flight, Second ed, p. xix. Prentice-Hall, 1989.
- ↑ [1]. unit2unit.eu
- ↑ 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 - ↑ Slug. DiracDelta Science & Engineering Encyclopedia
- ↑ Template:Cite web
- ↑ Celmer, Robert. Notes to Accompany Vibrations II. Version 2.2. 2009.
- ↑ [2]
- ↑ 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