A circular disc of mass \( M \) and radius \( R \) is rotating about P its axis with angular spe...

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A circular disc of mass \( M \) and radius \( R \) is rotating about
P its axis with angular speed \( \omega_{1} \). If another stationary disc

W having radius \( \frac{R}{2} \) and same mass \( M \) is dropped co-axially on to the rotating disc. Gradually both dises attain constant angular speed \( \omega_{2} \). The energy lost in the process is \( \mathrm{p} \% \) of the initial energy. Value of \( p \) is
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