A gramophone record is revolving with angular velocity $\omega$. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is µ. The coin will revolve with the record if –

Question

( A ) $r<\frac{\omega^2}{\mu g}$ <br/> ( B ) $r\leq \frac{\mu g}{\omega^2}$
( C ) $r=\mu g\omega^2$
( D ) $r\geq \frac{\mu g}{\omega^2}$