Answer: A spring with a torsional stiffness k is attached
Chapter 11, Problem 11-39(choose chapter or problem)
A spring with a torsional stiffness k is attached to the hinge at B. It is unstretched when the rod assembly is in the vertical position. Determine the weight W of the block that results in neutral equilibrium. Hint: Establish the potential energy function for a small angle \(\theta\), i.e., approximate \(\sin \theta \approx 0 \text {, and } \cos \theta \approx 1-\theta^{2} / 2 \text {. }\).
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