Selected category: force.
Selected initial unit : pound force.
Definition and details for pound force:
Pound force (lbf or lb) is a unit of force in the British gravitational system of units, equal to the force experienced at the Earth's surface by a mass of one pound. This force is equal to about 4.448 newtons. Symbol lbf is better for the pound force because it differs from the pound of mass symbol.
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