Pound-foot (torque)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A pound-foot (lb·ft or lbf·ft) is a unit of torque (a pseudovector). One pound-foot is the torque created by one pound force acting at a perpendicular distance of one foot from a pivot point.

One pound-foot is exactly 1.3558179483314004 newton meters.[note 1]

The name "pound-foot", intended to minimize confusion with the foot-pound as a unit of work, was apparently first proposed by British physicist Arthur Mason Worthington.[1] However, foot-pound (ft·lb or ft·lbf) is also sometimes used interchangeably with "pound-foot" to express torque.[2]

See also[edit]

Notes[edit]

  1. ^ This is the product of the international pound (0.45359237 kg), standard gravity (9.80665 m/s2) and the international foot (0.3048 m)

References[edit]

  1. ^ Arthur Mason Worthington (1900). Dynamics of rotation : an elementary introduction to rigid dynamics (3rd ed.). Longmans, Green, and Co. p. 9. 
  2. ^ Erjavec, Jack. Manual Transmissions & Transaxles: Classroom manual. p. 38. ISBN 978-1-4354-3933-7.