Elements of mechanics: for the use of colleges, academies, and high schools (1859)
Peck, William G. (William Guy), 1820-1892 · New York, A. S. Barnes & Burr · leaf 121
great mechanical advantage. Thefigure represents a combination of two -wheels and axles. To deduce theconditions of equilibrium, denote thepower by P, the resistance by H, theradius of the first wheel by r, that ofthe first axle by r\ that of the secondwheel by r, and that of the secondaxle by r.… … ELEMENTARY MACHINES. 119 Multiplying these equations together, member by member,and reducing, we have, Prr = Brr; or, P : B : : rr : rr. In like manner, were there any number of wheels andaxles in the combination, we might deduce the relation, Prrr™ . . . = Brrr^ . . . ; or, P : B : : rrry . . . .…
Mechanics
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