Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 98
ble block add eacha twofold advantage; hence, if n be the number of pul-leys, the relation will be W = 2 n.P. 102. The Inclined Plane in its simplest form is a devicefor lifting weights which would otherwise be inconvenientlyor impossibly great. It may be analyzed in two ways,either by virtual… … Fig. 39.—Compoundblock pulley. 82 PHYSICS the advantage is greater the longer d is, with respect to s—■that is, the smaller the angle of the plane — a. i d ws = pa, or w = — p. sAs a increases from 0° to 90°, we can easily see that thepressure, p, must be increased, as the plane gets steeper,
Physics
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