The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 174
rces is in agreement with a well-known law, namely, when two forces of equal powers ofresistance are opposed to each other, a state of rest is pro-duced. For a further illustration of the action of this truss, seeFig. 8, in which A, A, are pieces of the lower chord, thecentre being removed, B, B,… … E, E, are raised considerably above a horizontal line. Thisupward tendency will continue until the upper chord be-tween B, B, is deflected below a straight line, when the actionwill be reversed. 170 PRA^CTICAL MECHANICS. Figure 9 exhibits the forces at a state of rest, in whichA., xl, are portions…
Mechanics, Applied
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