Compound Pulley
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“Many wheels may be combined together, and in many ways, to form compound pulleys. Whenever there is but one rope running through the whole, as shown here, the relation of power and resistance is known by the number of folds, or turns, of the rope which supports the weight.” — Goodrich, 1844
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PulleysSource
S. G. Goodrich A Glance at the Physical Sciences (Boston: Bradbury, Soden, & Co., 1844) 94
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