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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 31

An illustration from 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, leaf 31
yshortened only by the differencesbetween the circumferences of theaxles; and the distance throughwhich the weight is praised is equalto haJf the shortening of the rope.The effect is therefore the same as if an axle had beenused with a radius equal to half the difference between theradii of the… … TJienT : W :: id : R. Whence P = - WxjdR W = PXR id R = Wxid and d = - PxRiW • Example 36.—In a differential wheel and axle the radius ofthe larger axle is 4i inches, the radius of the smaller axle is 4^inches, the radius of the wheel is 70 inches. What power willbalance a weight of 1000 lbs. ?…

Physics

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