Elements of mechanics: treated by means of the differential and integral calculus (1887)
Peck, William G[uy], 1820-1892. [from old catalog] · New York, Chicago, A. S. Barnes & company · leaf 120
. 89. The figure represents a combination of three movablepulleys, in which there are as many separatecords as there are pulleys ; the first end ofeach cord is attached at a fixed point, thesecond end being fastened to the hook ofthe next pulley in order, except the lastcord, at the second… … Fig. 78. t = \R; t = it; P = %tf. Multiplying these equations together, member by member,and striking out the common factors in the resulting equa-tion, we have, p = ays. Had there been n pulleys in the combination, we shouldhave obtained, in an entirely similar manner, the relation, (i)*-£; P: B 1…
Mechanics
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