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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 (1867)

Sangster, John Herbert, 1831-1904 · Montreal : Printed and published by John 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, 1867, leaf 39
n there are 3movable pulleys, what weight will besustained by a power of 17 lbs. Ans. 136 lbs. 65. In such a system what weight will apower of 70 lbs. support when thereare 5 movable pulleys ? Ans. 2240 lbs.In such a system what weight will apower of 100 lbs. support when thereare 11 movable… … 27 lbs. Arts. Ill, 112.] THE PULLEY. 37 a hook in the beam, each movable pulley triples the effect,and the conditions of equilibrium are that flie poicer is tothe iceight as 1 to S raised to the power indicated hy thenumber of movable pulleys. This will appear plain by a reference to the…

Physics

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