(mass)From Wikipedia, the free encyclopedia

The slug is a unit of mass associated with Imperial units and United States customary units. It is a mass that accelerates by 1 ft/s2 when a force of one pound (lbF) is exerted on it.

One slug has a mass of 32.174049 lbm or 14.593903 kg 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 approximately 32.2 lbF or 143 N.[2][3]

Contents

  [hide] 

1 History 2 Similar units 3 References 4 External links

History[edit]

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:

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.2 or in grams per cm./sec.2.

—Noel Charlton Little, College Physics, Charles Scribner's Sons, 1928, p. 165.

Three approaches to mass and force units[6][7]

V T E

 Base

force, length, time weight, length, time mass, length, time

Force (F) F = m⋅a = w⋅a/g F = m⋅a/gc = w⋅a/g F = m⋅a = w⋅a/gWeight (w) w = m⋅g w = m⋅g/gc ≈ m w = m⋅g

System BG GM EE M AE CGS MTS SI

Acceleration (a)

ft/s2 m/s2 ft/s2 m/s2 ft/s2 Gal m/s2 m/s2

Mass (m) slug hyl lbm kg lb g t kg

Force (F) lb kp lbF kp pdl dyn sn N

Pressure (p) lb/in 2 at PSI atm pdl/ft2 Ba pz Pa

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[edit]

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).[8][9]Similar terms include slugette,[10] and a snail.[11]

Similar metric units include the "glug" in the centimetre-gram-second system, and the "mug", "par", or "MTE" in the metre-kilogram-second system.[12]

References[edit]

1. ^ Jump up to:a b Shigley, Joseph E. and Mischke, Charles R. Mechanical Engineering Design, Sixth ed, pp. 31–33. McGraw Hill, 2001. ISBN 0-07-365939-8.

2. Jump up^ Beckwith, Thomas G., Roy D. Marangoni, et al. Mechanical Measurements, Fifth ed, pp. 34-36. Addison-Wesley Publishing, 1993. ISBN 0-201-56947-7.

3. Jump up^ Shevell, R.S. Fundamentals of Flight, Second ed, p. xix. Prentice-Hall, 1989.

4. Jump up^ [1]. unit2unit.eu5. Jump up^ Worthington, Arthur Mason (1900). Dynamics of Rotation:

An Elementary Introduction to Rigid Dynamics (3rd ed.). Longmans, Green, and Co. p. 9.

6. Jump up^ Michael R. Lindeburg (2011). Civil Engineering Reference Manual for the Pe Exam. Professional Publications. ISBN 1591263417.

7. Jump up^ Wurbs, Ralph A, Fort Hood Review Sessions for Professional Engineering Exam (PDF), retrieved October 26, 2011

8. Jump up^ Slug. DiracDelta Science & Engineering Encyclopedia9. Jump up^ "1 blob". Wolfram Alpha Computational Knowledge Engine.

Retrieved 27 October 2011.10. Jump up^ Celmer, Robert. Notes to Accompany Vibrations II. Version

2.2. 2009.11. Jump up^ [2]12. Jump up^ Cardarelli, François (1999). Scientific Units, Weights and

Measures. Springer. pp. 358, 377. ISBN 1-85233-682-X.

External links[edit]

"What is a Slug?" on phy-astr.gsu.edu Categories: 

Imperial units

Units of mass

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(mass)From Wikipedia, the free encyclopedia

The slug is a unit of mass associated with Imperial units and United States customary units. It is a mass that accelerates by 1 ft/s2 when a force of one pound (lbF) is exerted on it.

One slug has a mass of 32.174049 lbm or 14.593903 kg 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 approximately 32.2 lbF or 143 N.[2][3]

Contents

  [hide] 

1 History 2 Similar units 3 References 4 External links

History[edit]

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:

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.2 or in grams per cm./sec.2.

—Noel Charlton Little, College Physics, Charles Scribner's Sons, 1928, p. 165.

Three approaches to mass and force units[6][7]

V T E

 Base

force, length, time weight, length, time mass, length, time

Force (F) F = m⋅a = w⋅a/g F = m⋅a/gc = w⋅a/g F = m⋅a = w⋅a/gWeight (w) w = m⋅g w = m⋅g/gc ≈ m w = m⋅g

System BG GM EE M AE CGS MTS SI

Acceleration (a)

ft/s2 m/s2 ft/s2 m/s2 ft/s2 Gal m/s2 m/s2

Mass (m) slug hyl lbm kg lb g t kg

Force (F) lb kp lbF kp pdl dyn sn N

Pressure (p) lb/in 2 at PSI atm pdl/ft2 Ba pz Pa

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[edit]

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).[8][9]Similar terms include slugette,[10] and a snail.[11]

Similar metric units include the "glug" in the centimetre-gram-second system, and the "mug", "par", or "MTE" in the metre-kilogram-second system.[12]

References[edit]

13. ^ Jump up to:a b Shigley, Joseph E. and Mischke, Charles R. Mechanical Engineering Design, Sixth ed, pp. 31–33. McGraw Hill, 2001. ISBN 0-07-365939-8.

14. Jump up^ Beckwith, Thomas G., Roy D. Marangoni, et al. Mechanical Measurements, Fifth ed, pp. 34-36. Addison-Wesley Publishing, 1993. ISBN 0-201-56947-7.

15. Jump up^ Shevell, R.S. Fundamentals of Flight, Second ed, p. xix. Prentice-Hall, 1989.

16. Jump up^ [1]. unit2unit.eu17. Jump up^ Worthington, Arthur Mason (1900). Dynamics of Rotation:

An Elementary Introduction to Rigid Dynamics (3rd ed.). Longmans, Green, and Co. p. 9.

18. Jump up^ Michael R. Lindeburg (2011). Civil Engineering Reference Manual for the Pe Exam. Professional Publications. ISBN 1591263417.

19. Jump up^ Wurbs, Ralph A, Fort Hood Review Sessions for Professional Engineering Exam (PDF), retrieved October 26, 2011

20. Jump up^ Slug. DiracDelta Science & Engineering Encyclopedia21. Jump up^ "1 blob". Wolfram Alpha Computational Knowledge Engine.

Retrieved 27 October 2011.22. Jump up^ Celmer, Robert. Notes to Accompany Vibrations II. Version

2.2. 2009.23. Jump up^ [2]24. Jump up^ Cardarelli, François (1999). Scientific Units, Weights and

Measures. Springer. pp. 358, 377. ISBN 1-85233-682-X.

External links[edit]

"What is a Slug?" on phy-astr.gsu.edu Categories: 

Imperial units

Units of mass

Navigation menu Create account

Log in

Article

Talk

Read

Edit

View history

Main page

Contents

Featured content

Current events

Random article

Donate to Wikipedia

Wikipedia store Interaction

Help

About Wikipedia

Go

Community portal

Recent changes

Contact page Tools

What links here

Related changes

Upload file

Special pages

Permanent link

Page information

Wikidata item

Cite this page Print/export

Create a book

Download as PDF

Printable version Languages

Català

Español

فارسی Français

한국어 Nederlands

日本語 Piemontèis

Português

中文 Edit links

This page was last modified on 10 August 2015, at 07:48.

Text is available under the Creative Commons Attribution-ShareAlike License; additional

terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy.

Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit

organization.

Privacy policy

About Wikipedia

Disclaimers

Contact Wikipedia

Developers

Mobile view