Elements of mechanics: for the use of colleges, academies, and high schools (1859)
Peck, William G. (William Guy), 1820-1892 · New York, A. S. Barnes & Burr · leaf 41
ahave, If we make awe shall have, P = -^P2 + Pn - 2PP COS a. 0, its cosine will be 1, and we shall P = P + P.90°, its cosine will be equal to 0, and p = ^/p> + p<\ If we make a = 180°, its cosine will beshall have, P = P - P. 1, and we , The last three results conform to principles already… … Fig. 13. P : Q : P :: sin OPP : sin POP : sin OPP. ( 8.) If we apply a force P equal and directly opposed to P,the forces P, Q, and P, will be inequilibrium. The angles OPP,and QOP, being opposite exte-rior and interior angles, are sup-plements of each other; hence,sin OPP = sin QOP. Theangles P…
Mechanics
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