Analytical mechanics for students of physics and engineering (1913)
Dadourian, Haroutune Mugurditch, 1878- · New York, D. Van Nostrand company · leaf 60
h the a;-axis. Then the equations of equiUbrium become 2Z s 2?- cos 9 - i? + TT cos a = 0,SF =^sin0-PFsina = O,SG<,= PT-asin a-F&m.Q-a = 0. From either of the last two equations we get F = ^,W.sm Q Since W and a are fixed F can be changed only by changing 9. Thereforethe minimum value of F… … Fig. 35. Since cos 5 = 0 the first equation of equilibrium gives R = W cos a a Discussion. — It will be observed that the first two of the equationsof equihbrium are sufficient to solve the problem. When h is zero, F = 0 and R = W. On the other hand when h = a,F = WajidR = 0. PROBLEMS. 1. Prove…
Mechanics, Analytic
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