Notes and exercises in natural philosophy : including statics, hydrostatics, pneumatics, dynamics and hydrodynamics : designed for the use of normal and grammar schools, and the higher classes in common schools (1860)
Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 39
35|^ lbs. 64. In such a system when there are 3movable pulleys, what weight willbe sustained by a power of 17 lbs. ? Jns. 136 lbs. 65. In such a system what weight will apower of 70 lbs. support when thereare 5 movable pulleys ? Ans. 2240 lbs. 66. In such a system what weightwilla power of 100 lbs.… … 27 lbs AET8.111,n2.] THE PULLEY. 37 fastened to a hook in the beam, each movable pulleytriples the eftect, and the conditions of equilibrium are thatthe power is to the loeight as 1 to S raised by the powerindicated by the number of movable pulleys. Tliis will appear plain by a reference to the…
Physics
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