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 151
must be the resultantforce equivalent to the combined effects of P and Q.Hence the geometrical methods of compounding forcesare the same as those of compounding velocities. In the second case (b), the forces are generally meas-ured by the weights they can support (72), but the samegeometrical… … Fig. 48. whose position may be changed at will; over these arestretched two silk threads, knotted at a, sliding withoutfriction. At the extremities of these threads are hungtwo weights P and Q, and from a is hung a thirdweight, found by trial to be just sufficient to balanceP and Q for the given…
Mechanics
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