Q.
In the given figure, two wheels $P$ and $Q$ are connected by a belt $B$. The radius of $P$ is three times as that of $Q$. In case of same rotational kinetic energy, the ratio of rotational inertias $\left(\frac{I_{1}}{I_{2}}\right)$ will be $x: 1$. The value of $x$ will be____
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