A sphere of a radius 10cm weighs 1kg, calculate the moment of inertia.
- About the diameter.
- About the tangent.
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- $\text{I}=\frac{2}{5}\text{MR}^2=\frac{2}{5}\times1000\times(10)^2$
- $\text{I}=\frac{7}{5}\text{MR}^2$
$=1.4\times10^5\text{g cm}^2.$
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