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 157
ition taken in order is essential and mustbe carefully noted. Cor. The converse of this principle is also true: that 138 STATICS. L133- if three forces acting on a particle keep it in equilibrium,the sides of any triangle which are respectively parallelor perpendicular to them will be proportional… … Fia 56. tively (Fig. 56), be three forces acting on the particle A,and keeping it in equilibrium; then P : Q : 8 = sin CAD : sin BAD : sin BAC. For take Ab, Ac proportional to P and Q respectively,and complete the parallelogram Abdc, and draw Ad; Adwill be proportional to S and in the same straight…
Mechanics
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