1. The problem statement, all variables and given/known data A uniform circular disk whose radius R is 40.0 cm is suspended as a physical pendulum from a point on its rim. (a) What is its period of oscillation? (b) At what radial distance r < R is there a point of suspension that gives the same period? R = .40 m g = 9.81 m/s^2 h = .40m 2. Relevant equations T = 2pi(I/(mgh))^.5 I = .25mR^2 3. The attempt at a solution I don't understand why R is .40 m but h isn't. I arrived at a solution of .63 s, but the actual solution is 1.55 s.