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 108
singweights employed, by W ; and when it is applied at the.extremity of the arm r\ denote the counterpoising weightsemployed, by IP. We shall have, from the principle of thelever, Wr = WY, and Wr = Wr. Multiplying these equations, member by member, we have, Wrr = W Wrr ; .\ W = •/ W W ; that is,… … Fig. 69. ELEMENTARY MACHINES. 105 weighed in one scale and add counterpoising weights till thebeam is horizontal; then remove the body to be weighedand replace it by known weights till the beam is again hori-zontal ; the sum of the replacing weights will be the weightrequired. If, in changing the…
Mechanics
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