Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 99
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, … F;g. 40.—Inclined plane. and will finally equal the weight, w, when the plane is ver-tical. Then w — p. In Fig. 41 the weight is represented by a straight line,c g (which, as we have seen, must always be vertical andmust start from the center of gravity, c). This is the only
Physics
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