Answer to Question #201765 in Physics for mazzu

Question

Consider a “round” rigid body with moment of inertia

Answer 1

The moment of inertia of a solid cylinder with mass m and radius R:

$$I=\frac 12mR^2.$$

The moment of inertia of a ball (solid sphere) with mass m and radius R:

$$I=\frac 25 mR^2.$$