The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 53
CTICAL MECHANICS. placed in a block or case. A cord passes over the grooveof the wheel, in order to transmit the force applied, in anjproposed direction. There is no advantage gained by asingle fixed pulley ; but when there are moveable pillleys,the weight raised will always be greater than the… … As W is suspended by two cords, c and J,each cord willsupport 250 lbs. ; but as the cord is supposed to have afree motion over the wheels, the portions a, b, c, will havethe same stretch or tension ; hence P = 250 lbs. Application of the Principle of Work. When W ascends 1 foot, the cords c and b…
Mechanics, Applied
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