Two uniform, solid cylinders of radius r and total mass m are connected along their common axis by a short, light rod and rest on a horizontal tabletop (fig. 14.29). a frictionless ring at the center of the rod is attached to a spring with force constant k; the other end of the spring is fixed. the cylinders are pulled to the left a distance x, stretching the spring, and then released from rest. due to friction between the tabletop and the cylinders, the cylinders roll without slipping as they oscillate. show that the motion of the center of mass of the cylinders is simple harmonic, and find its period.
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