An elementary treatise on mechanics, embracing the theory of statics and dynamics, and its applications to solids and fluids (1849)
Smith, Augustus William, 1802-1866 · New York, Harper · leaf 150
6 STATICS. Let the power P make anangle e with the plane whoseinclination is a, and W theweight of the body. 1°. To determine the great-est value P can have withoutcausing the body to move upthe plane. In this case, thefriction fiR, opposing the motionup the plane, will act down it, and, resolving… … or P= W. (sin. a-\-\i cos. a) (60 cos. £+i^ sin. £ 2°. To determine the least value P can have without causingthe body to move down the plane. In this case the frictionwill oppose the descent, and will therefore act up the plane.Hence equations (a) and (b) become P. cos. £+|uR—W sin. a=0,P. sin. £+…
Mechanics, Analytic
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