Using the method of Section 10.8, solve 10.39. Determine whether the equilibrium is
Chapter 10, Problem 10.73(choose chapter or problem)
Using the method of Section 10.8, solve 10.39. Determine whether the equilibrium is stable, unstable, or neutral. (Hint: The potential energy corresponding to the couple exerted by a torsion spring is 2 1 2 , K where K is the torsional spring constant and is the angle of twist.) PROBLEM 10.39 The lever AB is attached to the horizontal shaft BC that passes through a bearing and is welded to a fixed support at C. The torsional spring constant of the shaft BC is K; that is, a couple of magnitude K is required to rotate end B through 1 rad. Knowing that the shaft is untwisted when AB is horizontal, determine the value of corresponding to the position of equilibrium when P = 100 N, l = 250 mm, and 12.5 N m/rad.
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