Phelan, Richard M. Department of Mechanical Systems and Design, Cornell University, Ithaca, New York.
Last reviewed:January 2020
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A pivoted rigid bar used to multiply force or motion, sometimes called the lever and fulcrum (Fig. 1). The lever uses one of the two conditions for static equilibrium, which is that the summation of moments about any point equals zero. The other condition is that the summation of forces acting in any direction through a point equals zero. See also: Inclined plane
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