# Chapter 8 - Rotational Motion - Problems: 30

$1.81 kg \cdot m^2$.

#### Work Step by Step

Assume this is a solid sphere. It is rotating around an axis passing through its center. $$I=\frac{2}{5}MR^2=\frac{2}{5}(10.8 kg)(0.648m)^2=1.81 kg \cdot m^2$$

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