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Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools (1861)

Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 39

An illustration from Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools, 1861, leaf 39
.In such a system when there are 3movable pulleys, what weight willbe sustained by a power of 17 lbs. ?Jns. 136 lbs.In such a system what weight will apower of 7b lbs. support when thereare 5 movable pulleys ? .ins. 2240 lbs.In such a system what weight willa power of 100 lbs. support whenthere are… … 27 lbs. AKTS.lll,n2.] THE PULLET. 37 fastened to a hook in the beam, each movable pulleytriples the eftect, and the conditions of equilibrium are thatthe po2ver is to the weight as 1 to 3 raised to the 2^owerindicated by the number of movahle pidleys. This will appear plain by a reference to the…

Physics

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