VIDEOS 1 TO 50

POUND MASS vs. POUND FORCE (lbm vs. lbf)

Published: 2014/04/07

Channel: Simply Engineering

Pound Force to Pound Mass Conversion : Physics & Math

Published: 2013/10/06

Channel: eHowEducation

Pound-force (lbf) vs Pound-mass (lbm) vs Slugs

Published: 2014/11/09

Channel: Boom of Prejudice

How Much Force to Rupture a Spleen: Sport Science

Published: 2014/07/15

Channel: Your Discovery Science

Pound-force Meaning

Published: 2015/04/20

Channel: SDictionary

Pound Mass versus Pound Force

Published: 2015/01/28

Channel: APMonitor.com

How to Convert Newton Meters to Pound Force Feet : Conversions & Other Math Tips

Published: 2013/01/09

Channel: eHowEducation

Pound (force)

Published: 2014/09/30

Channel: Audiopedia

Apply Force Units

Published: 2014/08/10

Channel: Donald Elger

How to Determine Muzzle Energy(Ft/lbs Energy)

Published: 2016/11/06

Channel: Shiawassee Gunner

How Much Force Does It Take To Break A Bone?

Published: 2016/10/20

Channel: Seeker

My New Magnet Fishing Magnet 500 LB Holding Force Will It Lift A 315 LB Man?

Published: 2017/02/06

Channel: Jiggs Outdoors

Pound (force)

Published: 2016/01/29

Channel: WikiAudio

1N = x pound-force

Published: 2017/10/04

Channel: Jordin

Pound Force, Kilogram Force and Gravitational Constant - Applied Fluid Dynamics - Class 006

Published: 2015/09/24

Channel: Chemical Engineering Guy

World's Heaviest Weight

Published: 2017/05/24

Channel: Veritasium

Explaining mass and force units

Published: 2014/01/27

Channel: Brittany Minnich

POUND FORCE - ALAN DUNCAN MP GETS A NEW GARDEN FEATURE

Published: 2009/05/14

Channel: dontpanicmedia

Determine the force in each chain for equilibrium. Take d = 1 ft

Published: 2016/11/06

Channel: FinalAnswer

Alan Duncan Pound Force

Published: 2011/07/06

Channel: Don't Panic London

That punch thođđŞ 344 pounds of force

Published: 2016/01/08

Channel: Mohammed Ahmar

How To : Convert Inch-lbs & Foot-lbs

Published: 2014/04/08

Channel: Real Tool Reviews

How to Convert the Torque From Foot-Pounds : Science & Math

Published: 2013/10/05

Channel: eHowEducation

Resolve this force into components acting along members AB and AC

Published: 2016/10/09

Channel: FinalAnswer

Steel Bender's Helperâ˘ Ratings: Pounds of Force Required to Bend Them

Published: 2017/05/23

Channel: Primal Punch

Study: T. Rex Could Crush Bones With 8,000 Pounds of Force

Published: 2017/05/17

Channel: United News International

Pound force/KG force/KG Weight concepts TA0104

Published: 2017/11/04

Channel: Technical Atyachar

Frank Stea's punch inflicts 1,394lbs of force. Undeniable PROOF!!!!!

Published: 2011/04/23

Channel: Frank Stea

DragonForce - Operation Ground And Pound [OFFICIAL VIDEO]

Published: 2006/08/18

Channel: Roadrunner Records

2000 pound force

Published: 2017/07/29

Channel: dats fomino

Resolve the 30-lb force into components along the u and v axes

Published: 2016/10/09

Channel: FinalAnswer

Know Huntsville - Foot Pound Force - Bacon Machine

Published: 2015/04/28

Channel: Know Huntsville

Showing Off My 220 Pound Magnet

Published: 2016/05/09

Channel: James Ray

How much force to throw a 60 lb thing over a wall?

Published: 2017/07/14

Channel: Rhett Allain

Related lbm to lbf on earth

Published: 2014/08/11

Channel: Donald Elger

Foot Pound Force - Bacon Machine

Published: 2013/09/02

Channel: Dragoncon FilkTrack

The Dropped Object Experiment | 1 LB Bolt, 20' vs. 30' | Safety Week 2016

Published: 2016/05/03

Channel: Black & Veatch

75 pound Force compound bow

Published: 2016/08/05

Channel: Hank Williams

How to Convert Inch-Pounds to Newton-Meters : Conversions & Other Math Tips

Published: 2013/01/20

Channel: eHowEducation

What`s a "psi"?

Published: 2014/07/21

Channel: apprenticemath

Foot-pound Force - Zombie Prostitute

Published: 2015/04/05

Channel: H. Kyoht Luterman

Foot-pound Force - Little Red Button

Published: 2015/04/05

Channel: H. Kyoht Luterman

Know Huntsville - Foot Pound Force

Published: 2015/04/20

Channel: Know Huntsville

BRYAN POUND ft JESSICA DiGIOV - MIDNIGHT

Published: 2017/11/26

Channel: OpciĂłnPositiva +music

Pounds per square inch

Published: 2014/08/30

Channel: Audiopedia

Determine the moment of this force and the required force F

Published: 2016/10/24

Channel: FinalAnswer

Destructive Test of 200 PSI Hydraulic Gauge

Published: 2015/10/22

Channel: AvE

Dj Snoopy ft. Lb - Undercover Lover (Official Video) | Shot By: Liquidartsmedia

Published: 2017/06/22

Channel: LiquidArtsMedia

How to use a Torque Wrench

Published: 2016/07/22

Channel: Mark's Garage

LB FT PEPPA BABY - ONLY THE FAMILY (Official Audio)

Published: 2017/12/25

Channel: Peppa baby

Â Â (Redirected from Pound-force)

Look up or pound-force in Wiktionary, the free dictionary.pound |

Pound-force | |
---|---|

Unit system | English Engineering units, British Gravitational System |

Symbol | lbfâ |

Unit conversions | |

1 lbf in ... |
... is equal to ... |

SI units | 4.448222 N |

CGS units | 444,822.2 dyn |

Absolute English System | 32.17405 pdl |

The **pound-force** (symbol: **lbf**^{[1]}, sometimes **lb _{f}**,

The pound-force is equal to the gravitational force exerted on a mass of one avoirdupois pound on the surface of Earth. Since the 18th century, the unit has been used in low-precision measurements, for which small changes in Earth's gravity (which varies from place to place by up to half a percent) can safely be neglected.^{[4]}

The 20th century, however, brought the need for a more precise definition. A standardized value for acceleration due to gravity was therefore needed.

The pound-force is the product of one avoirdupois pound (exactly 59237 kg) and the 0.453standard acceleration due to gravity, 65 m/s^{2} (about 9.806049 ft/s^{2}). 32.174^{[5]}^{[6]}^{[7]}

The standard values of acceleration of the standard gravitational field (*g*_{n}) and the international avoirdupois pound (lb) result in a pound-force equal to 2216152605 N: 4.448^{[8]}

This definition can be rephrased in terms of the slug. A slug has a mass of 32.174049 lb. A pound-force is the amount of force required to accelerate a slug at a rate of ^{2}, so: 1 ft/s

newton (SI unit) |
dyne | kilogram-force, kilopond |
pound-force | poundal | |
---|---|---|---|---|---|

1 N | âĄ 1 kgâ
m/s^{2} |
= 10^{5} dyn |
â 0.10197 kp | â 0.22481 lbf | â 7.2330 pdl |

1 dyn | = 10^{â5} N |
âĄ 1 gâ
cm/s^{2} |
â 1.0197 Ă 10^{â6} kp |
â 2.2481 Ă 10^{â6} lbf |
â 7.2330 Ă 10^{â5} pdl |

1 kp | = 9.80665 N | = 980665 dyn | âĄ g_{n}â
(1 kg) |
â 2.2046 lbf | â 70.932 pdl |

1 lbf | â 4.448222 N | â 444822 dyn | â 0.45359 kp | âĄ g_{n}â
(1 lb) |
â 32.174 pdl |

1 pdl | â 0.138255 N | â 13825 dyn | â 0.014098 kp | â 0.031081 lbf | âĄ 1 lbâ
ft/s^{2} |

The value of g_{n} as used in the official definition of the kilogram-force is used here for all gravitational units. |

In some contexts, the term "pound" is used almost exclusively to refer to the unit of force and not the unit of mass. In those applications, the preferred unit of mass is the slug, i.e. lbfâ
s^{2}/ft. In other contexts, the unit "pound" refers to a unit of mass. The international standard symbol for the pound as a unit of mass is lb.^{[9]}

Base | Force | Weight | Mass | |||||
---|---|---|---|---|---|---|---|---|

2nd law of motion | m = F/a |
F = Wâ
a/g |
F = mâ
a |
|||||

System | BG | GM | EE | M | AE | CGS | MTS | SI |

Acceleration (a) |
ft/s^{2} |
m/s^{2} |
ft/s^{2} |
m/s^{2} |
ft/s^{2} |
gal | m/s^{2} |
m/s^{2} |

Mass (m) |
slug | hyl | pound-mass | kilogram | pound | gram | tonne | kilogram |

Force (F),weight ( W) |
pound | kilopond | pound-force | kilopond | poundal | dyne | sthĂ¨ne | newton |

Pressure (p) |
pound per square inch | technical atmosphere | pound-force per square inch | atmosphere | poundal per square foot | barye | pieze | pascal |

In the "engineering" systems (middle column), the weight of the mass unit (pound-mass) on Earth's surface is approximately equal to the force unit (pound-force). This is convenient because one pound mass exerts one pound force due to gravity. Note, however, unlike the other systems the force unit is not equal to the mass unit multiplied by the acceleration unit^{[12]}âthe use of Newton's Second Law, *F* = *m* â
*a*, requires another factor, *g _{c}*, usually taken to be 32.174049 (lbâ
ft)/(lbfâ
s

- Foot-pound (energy)
- Ton-force
- Kip (unit)
- Mass in general relativity
- Mass in special relativity
- Mass versus weight for the difference between the two physical properties
- Newton
- Poundal
- Pounds per square inch, a unit of pressure

**^**IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units), IEEE Std 260.1â˘-2004 (Revision of IEEE Std 260.1-1993)**^**Fletcher, Leroy S.; Shoup, Terry E. (1978),*Introduction to Engineering*, Prentice-Hall, ISBN 978-0135018583, LCCN 77024142.^{:257}**^**"Mass and Weight".*engineeringtoolbox.com*.**^**Acceleration due to gravity varies over the surface of the Earth, generally increasing from about 9.78 m/s^{2}(32.1 ft/s^{2}) at the equator to about 9.83 m/s^{2}(32.3 ft/s^{2}) at the poles.**^***BS 350 : Part 1: 1974 Conversion factors and tables, Part 1. Basis of tables. Conversion factors*. British Standards Institution. 1974. p. 43.**^**In 1901 the third CGPM declared (second resolution) that:The value adopted in the International Service of Weights and Measures for the standard acceleration due to Earth's gravity is

^{2}, value already stated in the laws of some countries. 980.665 cm/sThis value was the conventional reference for calculating the kilogram-force, a unit of force whose use has been deprecated since the introduction of SI.

**^**Barry N. Taylor,*Guide for the Use of the International System of Units (SI)*, 1995, NIST Special Publication 811, Appendix B note 24**^**The international avoirdupois pound is defined to be exactly 59237 kg. 0.453**^**IEEE Std 260.1â˘-2004, IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)**^**Comings, E. W. (1940). "English Engineering Units and Their Dimensions".*Industrial & Engineering Chemistry*.**32**(7): 984â987. doi:10.1021/ie50367a028.**^**Klinkenberg, Adrian (1969). "The American Engineering System of Units and Its Dimensional Constant g_{c}".*Industrial & Engineering Chemistry*.**61**(4): 53â59. doi:10.1021/ie50712a010.**^**The acceleration unit is the distance unit divided by the time unit squared.

- Obert, Edward F., âTHERMODYNAMICSâ, D.J. Leggett Book Company Inc., New York 1948; Chapter I, Survey of Dimensions and Units, pages 1-24.

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