Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 63
raise the weight. In this case the force required at F isequal to the weight lifted at TF, neglecting friction. This arrangement forms a lever of the first class. Com-pare this with a first-class lever. In the case of a single movable pulley, as in Fig. 69,the force necessary at F is one-half the…
Mechanics, Applied
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