Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
he same relation to the weight thatthe single movable pulley (Fig. 35) does to the weight; that is, thelowest pulley being sustained by two cords, if the weight be divided by2 it will express the weight held by the next pulley above; and so on. Hence, equilibrium obtains when the power equals the… … 79. Figure 37.—Compound pulleyswith two or more movable pulleys.— Pulleys of this kind are arranged in two blocks,one block being movable, and the other im-movable, and the weight is divided equallyamong the cords passing aronnd the pulleys ofthe movable block; and as the power requiredto sustain a…
Physics · Astronomy
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