The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 44
21 lbs. PRACTICAL MECHAN1C^ 39 Ques. 13. At what distance from the fulcrum must theload be, in the last example, so that the steam may have apressure of 16 lbs. over the pressure of the atmosphere ?16 X 6 —5 = 91.Suppose D to be the required position of the load, thenFD X 21 + 8 X t = 91 X 12;.•. F… … P X 4 = 200 X T,.-. P = 350. Qfms. 15. A rope A D supports a uniform pole 0 D, rest-ing on the ground at 0, and supporting the weight W, sus-pended from D ; required the tension of the rope, when AD = 175 feet, 0 A = 40 feet, 0 D = 145 feet, W = 50cwt., and weight of 0 D = 10 cwt? In this example 0…
Mechanics, Applied
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