. A text book of elementary mechanics, for the use of colleges and schools. Fig. 133. Fig. 134. 134). In this case the power (P) is the tension of the string (orthrust of the prop), and its moment is ; the weight is that ofthe bar acting at its centre of gravity B, and its moment is value of P, derived from the equation RAF= , will give the tension of the string (or thrust of the prop) neededjust to support the rod. 200 STATICS. [190. 190. The Lever on the Principle of Work. It has beenshown in Art. 179 that, in the case of every machine, iffriction and all other hurtful resis
. A text book of elementary mechanics, for the use of colleges and schools. Fig. 133. Fig. 134. 134). In this case the power (P) is the tension of the string (orthrust of the prop), and its moment is ; the weight is that ofthe bar acting at its centre of gravity B, and its moment is value of P, derived from the equation RAF= , will give the tension of the string (or thrust of the prop) neededjust to support the rod. 200 STATICS. [190. 190. The Lever on the Principle of Work. It has beenshown in Art. 179 that, in the case of every machine, iffriction and all other hurtful resistances are eliminated, = , p A W ~~ s or W = T- (^ Here s is the distance through which the power acts,and A the distance through which the weight is a resistance (R) is overcome through a distance d,then - , P d m By the use of these equations the relation of the Powerto the Weight (or Resistance), when the Power raisesthe Weight uniformly, can be obtained. This value of P —r is the same as that deduced on condition of equilib-w rium, on the pr
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmechanics, bookyear18
