Martin, Louis Adolphe, 1880- · New York, J.Wiley & Sons, Inc.: [etc. etc.] · leaf 94
pectively to the three axesof reference. Without disturbing theequilibrium of the system, twoforces equal in magnitude andhaving the same line of action but being opposite indirection can be applied at the point {x, 0, z). Assiunethese forces equal to X and parallel to the a;-axis. Applya similar… … 78 APPLIED STATICS in a positive direction along the aj-axis. One of thesecouples (whose forces are marked /) lies in the planexz, the other couple (whose forces are marked //) lies ina plane parallel to the plane xy. The signs of these couples are determined by thedirection of rotation which they…
Mechanics
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