77_Problem CHAPTER 10

# 77_Problem CHAPTER 10 - PROBLEM 10.69 Two identical uniform...

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PROBLEM 10.69 Two identical uniform rods, each of weight W and length L , are attached to pulleys that are connected by a belt as shown. Assuming that no slipping occurs between the belt and the pulleys, determine the positions of equilibrium of the system and state in each case whether the equilibrium is stable, unstable, or neutral. SOLUTION Let each rod be of length L and weight W . Then the potential energy V is sin cos2 2 2 θ θ = + L L V W W Then cos sin 2 2
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