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 161
than ThreeForces acting on a Particle. Any number of forces act-ing upon a particle will hold it in equilibrium, tokenthey may be represented by the sides of a polygon takenin order. The forces P, Q, S, 3T,and U (Fig. 63), 142 STATICS. [136, represented by AB, AC, AD, AE, AF respectively,will hold… … Fig. 63, the resultant of the four forces P, Q, S9 T, and sincethe fifth force, U, represented by ea, is equal andopposite to ae, it must hold it in equilibrium ; that is,all the forces must be in equilibrium. This propositionis called the Polygon of Forces. It obviously applies aswell to the case…
Mechanics
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