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 40
gure 11, there are movable pulleys; what weight may be supported by a power of 10 lbs.? Ans. 2430 lbs. 70. In such a system there are 7 movable pulleys and the weightis 24057 lbs. Piequired the power. Ans. 11 lbs. 71. In such a system there are 9movable pulleys — throughhow many feet must thepower… … 38 THE INCLINED PLANE. [Aktb. 113-117 than the weight; and as this angle approaches 180°, thedifference between the power and weight will approachGC. Hence it is impossible for any power P, howevergreat, applied at P, to pull the cord J.^ (7 mathematicallystraight, and that however small the weight…
Physics
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