mechanical advantage

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mechanical advantage

Etymology: Gk, mechane, machine; L, abante, superior position
the ratio of the output force developed by a muscle to the input force applied to the body structure that the muscle moves. Variations in the sizes of muscles and the lengths of bones in different individuals partially account for the differences in mechanical advantage and physical capabilities, such as speed and strength, among body types.

mechanical advantage

the difference in forces in a lever system due to the inequalities of the lever arms between the forces and the fulcrum (pivot or axis). See also efficiency.