second-class lever

A lever in which the force arm is longer than the work-producing arm; thus the work produced is always greater than the energy used, with a resultant high efficiency.

A lever that has its point of resistance (load) between its fulcrum (point of support or axis of rotation) and point of effort (force application). In the human body, a second class lever is used when a person stands on tip-toe.

Second-class lever
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