Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 79
e point, repre-sent the magnitude and the direction of the three forces exerted bythe spring-balances. Now with A and B of Fig. 42 as two of the sides draw a parallelo-gram, taking pains to make it accurate.* Then make a parallelogramwith B and C as sides, then one with A and G as sides. Compare… … Fig. 43. appears to be close to LI and parallel to it. Then a pencil-mark ismade along the edge op. A better method is to set the edge op on the line LI and then guidethe block to a new position by sliding it along the straight edge of aruler at right angles with LI. THE PARALLELOGRAM OF FORCES. 67…
Physics
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