Gilley, Frank M · Boston, Allyn & Bacon · leaf 124
ircle 2inches in diameter. The power dis-tance, the circumference of this circle = 2 x 3^^ inches = 6^inches, or about 6.3 inches. In case the power applied is 20pounds, by substituting the formula, Wx w = P xp,TF X tV = 20 X 6.3, W= 1260 pounds, the force that would be applied by the screw in case… … Fig. 121. 127. Power compared with Speed. — Set a nut, N, Fig. 122,in a board, C. Tie a 20-pound weight, W, to the lower end ofthe bolt, B. E is a, rod or wrench attached to the head of thebolt. The spring balance is so placed that DE = 3^ inches.This distance is taken for convenience in…
Physics
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