An elementary treatise on mechanics, embracing the theory of statics and dynamics, and its applications to solids and fluids (1849)
Smith, Augustus William, 1802-1866 · New York, Harper · leaf 122
ed the relation of the power to the weight inthe second system of pulleys. The annexed figure represents this system with three mov-able pulleys, each pulley having its own rope.Designate by «,, a2, a3, &c, the pulleys re-spectively in their order from the weight W,by io,, w2, w3, &c, their… … or * ^ ■.. , W+w1+2w9+2*w.For the equilibrium of a 3,2t3=t2-\-w 3= —— — or THE PULLEY. W+wl+2w2+2*w, For the equilibrium of an, W+w1+2w2+22w:i+2Wi+ . . . 2r P=tH=- lwn Cor. 1. If the weight of each pulley is the same, and equal wx, v=W+w, (l+2+22+23 + .... 2-1)2n W w — i (2- I) -2.+ 2 w ■(- 1 ~2…
Mechanics, Analytic
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