International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 382
other familiar fact is also recognized, for the velocityratio of P to W is lo : |, or 40. Since in any machine theweight equals the power multiplied by the velocity ratio, W= PX 40, and when P— 1 pound, \V= 40 pounds. 9S2. This principle is made use of in the hydraulicpress represented in Fig. 100.… … ^^ Fio. 166. it to rise, thus lifting the platform A, and compressing thebales. If the area of « be 1 square inch, and that of 6be 100square inches, the velocity ratio will be 100. If the length of the lever between the hand and the ful-crum is 10 times the length between the fulcrum and thepiston…
Railroad engineering
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