Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 86
of a machine at which a force. F. is applied, and Bthe working point. Let D be the distance moved by thepoint of application of the force F. and D that moved bythe working point which exerts a force. F. Then, if themachine is a perfect one. W=FD = FJj. (3) or. the mechanical advantage = — = — F… … Fig. 47, 76 WORK AND ENERGY.
Physics
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