Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 163
171, A double moveable Pulley. F: W=R:4:R, or F= IW, v = 4t>. JL double moveable Pulley.F: W=R:±R, or F = {W, * 2u o: t> = 1: 2m. … 172. Quadruple moveable Pulley.F=hW. F:W=R:H& Let w = any number of moveable pulleys, the w F = 2u v : v = 1 : 2«. 173. Compound Pulleys. U = number of moveable Pulleys.IF a* W = 2^, v : v = 1 : 2U. Funicular and Catenarian. 149
Mechanical engineering · Engineering
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