piazza discussion link An inconsequential prisoner is fastened under a pendulum

Question

piazza discussion link An inconsequential prisoner is fastened under a pendulum blade composed of a uniform rod of length L = 10.0 ft and a uniform semicircular disk of radius R = 4.0 ft, which each weigh W = 41.0 lb. The blade is initially in the horizontal configuration shown and released from rest. Ignoring friction determine the reaction force acting on the pendulum from the support at the pivot point O the instant after the blade is released. But first determine the mass center location of the pendulum blade using the pivot point O as the origin. Next determine the mass moment of inertia of the pendulum blade about the axis that is parallel to the Z-axis and passes through the pivot point O. And finally find the reaction force acting at the point O. What is the x component of R? What is the y component of R?

Explanation / Answer

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