Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 84
By comparing the dotted triangle with the triangle whosesides are L, B, and H we see that P : W (or IF) : : H: L, THE PARALLELOGRAM OF FORGES. 71 or PXL=WX H, P= Wx (H+L). EXPERIMENTS. Take apparatus No. XX and adjust it as indicated by Fig. 50, put-ting 7 oz. upon the pan, so that P= 7+ 1 = 8 oz.… … Fig. 50. lower the incline till the weight W will barely roll up the inclinewhen the apparatus is purposely jarred slightly. (The incline cannotbe quite so steep when this takes place as it might be if there wereno friction. If a knot is made in the thread near where it passes overthe pulley at the…
Physics
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