일반물리학 1 — Oscillations: Problem 7

7 In Fig. 15-23, the pendulum consists of a uniform disk with radius $r = 10.0\text{ cm}$ and mass $500\text{ g}$ attached to a uniform rod with length $L = 500\text{ mm}$ and mass $250\text{ g}$. (a) Calculate the rotational inertia of the pendulum about the pivot point. (b) What is the distance between the pivot point and the center of mass of the pendulum? (c) Calculate the period of oscillation.