International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 357
pull the body up the plane by means of the rope r and pulley p. Itis required to find what the weight of P must be in order to start IVupthe plane. Suppose />F weighs 120 pounds, and that friction is neglect-ed. It is also required to find the perpendicular pressure which IVexerts against the… … 346 ELEMENTARY MECHANICS. respectively, parallel and perpendicular to the plane, a c represents the magnitude of the force which must be exerted parallel to . / /> in order to put the body in equilibrium—i. e., to balance the force which gravity exerts in pulling the body down the plane. If the…
Railroad engineering
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