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 29
dius of the wheelcorresponding to the arm of thepower and the radius of the axleto the arm of the weight. 84. The wheel and axle is sometimes called the con-tinual or ^;er/3e^Ma/ lever^ because the power acts continu-ally on the weight. 85. The power and weight in the wheel and axle are… … Then P :W::r:R. Hence P R W= PXR PXR ,„ Wxr—ff?-; andi?=-p—. Example 27.—In a wheel and axle the radius of the axle is 7inches, the radius of the wheel is 35 inches, what power willbalance a weight of 643 lbs. ? AET.86.] THE WHEEL AND AXLE. 27 SOLUTION. Here JF= 643 lbs., J2 = 35 inches, and r = 7…
Physics
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