A ring of radius \( R \) is first rotated with an angular velocity \( \omega_{0} \) and then car...

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A ring of radius \( R \) is first rotated with an angular velocity \( \omega_{0} \) and then carefully placed on a rough horizontal surface. The
P coefficient of friction between the surface and the ring is \( \mu \).

W Time after which its angular speed is reduced to half is
(1) \( \frac{\omega_{0} \mu R}{2 g} \)
(2) \( \frac{\omega_{0} g}{2 \mu R} \)
(3) \( \frac{2 \omega_{0} R}{\mu g} \)
(4) \( \frac{\omega_{0} R}{2 \mu g} \)
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