First slide

Moment of intertia

Question

The following bodies have same mass and radius. The body with largest moment of inertia about geometric axis is

Easy

A

Solid sphere
B

Hollow sphere
C

Disc
D

Ring

Solution

solid sphere = $\frac{2}{5} m R^{2}$
Hollow sphere = $\frac{2}{3} m R^{2}$
Disc = $\frac{1}{2} m R^{2}$
Ring = $m R^{2}$

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