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 258
its threesides respectively parallel to the three forces, and hence(132, Cor.) these sides are proportional to them. Again,the triangles AB C and KHL are mutually equiangularand similar, hence P: W:R = AB:BC: AC, or and = HK: HL: LK; p w = HKHL = Sm a> RW = LK -^yy = cos a. (1) (2) The result in… … Fig. 179. three forces P, R, W be represented by the three linesmeeting at A. Through B draw BC parallel to the di-rection of W, and produce R to meet BC at C. Thesides of the triangle ABC are respectively parallel to thethree forces P, P, W, and therefore (132, Cor.) are pro- 240 STATICS. [231.…
Mechanics
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