Using the method of Sec. 10.8, solve Prob. 10.39.
Chapter 10, Problem 10.73(choose chapter or problem)
Using the method of Sec. 10.8, solve Prob. 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 \(\frac{1}{2} K u^{2}\), where K is the torsional spring constant and u is the angle of twist.)
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