Gilley, Frank M · Boston, Allyn & Bacon · leaf 111
for no matter in what direction A is pulled, thedistance from the fulcrum to the line ofthe force is always the radius of the circle,and all the radii of a circle are equal. 112. Crank and Axle. — Sometimes oneof the pulleys is replaced by a simplelever or crank. Suppose that in Fig. 108all but one… … Fig. 108 Problems. 1. If the handle of a clothes-wringer is 10 inches from the axis,the rubber roll is 2 inches in diameter, and a force of 30 pounds isexerted on the handle, what is the force on the surface of the rubberroll? Ans. 300 lbs. Notice that 2 inches is the diameter of the axle, and 10…
Physics
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