User:Milton Beychok/Sandbox2: Difference between revisions
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The '''pound-force''' (symbol: '''lbf''' <ref name=lbf group=Note/> ) is a [[measurement]] unit of [[force]] which will [[acceleration|accelerate]] 1 [[Pound (mass)|pound]] of [[mass]] to 9.80665 [[metre|m]]/[[second|s]]<sup>2</sup> (≈ 32.17405 [[foot|ft]]/[[second|s]]<sup>2</sup>), the standard average [[acceleration due to gravity]] on [[Earth]]'s surface (referred to as '''''g<sub>n</sub>'''''). It is used primarily in the [[United States]] and is equivalent to exactly 4.4482216152605 [[newton]]s. | The '''pound-force''' (symbol: '''lbf''' <ref name=lbf group=Note/> ) is a [[measurement]] unit of [[force]] which will [[acceleration|accelerate]] 1 [[Pound (mass)|pound]] of [[mass]] to 9.80665 [[metre|m]]/[[second|s]]<sup>2</sup> (≈ 32.17405 [[foot|ft]]/[[second|s]]<sup>2</sup>), the standard average [[acceleration due to gravity]] on [[Earth]]'s surface (referred to as '''''g<sub>n</sub>'''''). It is used primarily in the [[United States]] and is equivalent to exactly 4.4482216152605 [[newton]]s. | ||
In common usage and other contexts, it is most often referred to in the United States as a '''''pound''''' or as '''''lb''''', but this can lead to confusion with the [[pound (mass)|pound-mass]. | In common usage and other contexts, it is most often referred to in the United States as a '''''pound''''' or as '''''lb''''', but this can lead to confusion with the [[pound (mass)|pound-mass]]. | ||
Revision as of 14:45, 5 July 2011
The pound-force (symbol: lbf [Note 1] ) is a measurement unit of force which will accelerate 1 pound of mass to 9.80665 m/s2 (≈ 32.17405 ft/s2), the standard average acceleration due to gravity on Earth's surface (referred to as gn). It is used primarily in the United States and is equivalent to exactly 4.4482216152605 newtons.
In common usage and other contexts, it is most often referred to in the United States as a pound or as lb, but this can lead to confusion with the pound-mass.
Notes
- ↑ The symbol lbf is derived from the Latin libra for "pound" and the symbol f for "force")