Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 97
Fig. 36.—Simplepulley. Fig. 37.—Movablepulley. Fig. 38.—Series ofmovable pulleys. In this form it is simply a lever of the second class(Fig. 33), in which a = 2b. By arranging a suitable system of movable pulleys,almost any mechanical advantage can be secured. It is, MACHINES 81 of course, at the…
Physics
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