A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 93
he former must de-scend through as many inches more than thelatter ascends, as the number of bends in the cordsupporting the lower block exceeds unity: thatis, the power must sink four inches or feet toelevate the weight one inch or foot; and suchwill be the ratio of its efficiency with such… … 321bS. THE INCLINED PLANE. 9) 193. A great variety of systems, or, as theyare commonly termed tackles of pulleys, havebeen contrived; but the advantages they respec-tively afford may always be estimated by refer-ence to the spaces relatively described by thepower and the weight or resistance. The…
Physics
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