A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 255
W : R = sin WOR : sin POR : sin WOP, = sin (180° - a) : sin (90° - fi) : sin (90° + a +/?), = sin a : cos /? : cos (a + j3). Hence P = Z*£ R = KLC^+J1.cos p cos p • Second Method. The above relation may also be ob-tained as follows: Since the forces P, W, R are in equi-librium (141), the algebraic… … Fig. 177. coinciding with the direction of R. Then, taken geo-metrically, the component of R along HL = 0, of P =abM of W = — ad; also, along the other axis the compo- 229,] INCLINED PLANE. 237 nents of E, P, and W are respectively B, ac, — ae. Ex-pressing these conditions trigonometrically, we…
Mechanics
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