1. The problem statement, all variables and given/known data Find the period of a pendulum consisting of a disk of mass M and radius R fixed to the end of a rod of length l and mass m.How does the period change if the disk is mounted to the rod by a frictionless bearing so that it is perfectly free to spin? 2. Relevant equations torque=moment of inertia*alpha=r X F 3. The attempt at a solution I know how to do the first part,but I can't do the second part.What happens when the disk is free to spin?