Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 58
ed in combination with afixed pulley for raising heavy weights. 167. The Tackle, near the right, Fig. 49, consists of sev-eral fixed and movable pulleys with a single rope wrappedaround them all. For convenience, those at each end areusually placed side by side in a single block. The powergained is… … 48 MECHANICS OF SOLIDS. one pulley being the weight of a second, and so on. In thiscase, the first rope sustains one-half the weight, and thesecond one-half of that, and so on. Hence in this case,the proportion is found by raising one-half to the powerindicated by the number of cords or blocks.…
Physics
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