Moment of inertia of a sphere,

$\overline{){\mathit{I}}{\mathbf{}}{\mathbf{=}}\frac{\mathbf{2}}{\mathbf{3}}{\mathbf{m}}{{\mathbf{r}}}^{{\mathbf{2}}}}$

$\mathit{m}\mathbf{=}\mathbf{2}\mathbf{.}\mathbf{7}\mathbf{}\overline{)\mathbf{g}}\mathbf{\times}\frac{\mathbf{1}\mathbf{}\mathbf{kg}}{\mathbf{1000}\mathbf{}\overline{)\mathbf{g}}}\mathbf{=}\mathbf{2}\mathbf{.}\mathbf{7}\mathbf{\times}{\mathbf{10}}^{\mathbf{-}\mathbf{3}}\mathbf{kg}$

A regulation table tennis ball has a mass of 2.7g and is 40mm in diameter. What is its moment of inertia about an axis that passes through its center?

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