The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 41
e the beam actsas if its whole weight were collected in its middle point. n ~TpB A Ques. 8. The weidit of the lever of the first kind = 10lbs., the length A B= 56 inches ; A F = 40 ; C F = 36 ;D F == 5 inches, and W = 150 ll3S ; required P, in orderto maintain the lever in equilibrium. In this case… … Ques, 9. The weightof the lever S R, of thefirst order = 31 lbs.; SR = 85 inches; S F =55 ; A F = 43 ; B F =19 ; and W = 34 lbs.Required P? PRACTICAL MECHANICS. 37 P X 43 + 31 X 3| = W X 19, P=:^ 34 X 19 — 31 X 3 43 2 12* lbs. Ques. 10. The weight of alever of the second order =8 lbs. S R = 80…
Mechanics, Applied
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