A gramophone record is revolving with an angular velocity ω. 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
1
\(r\ge \frac{\mu g}{{{\omega }^{2}}}\)
2
r = μgω2
3
\(r<\frac{{{\omega }^{2}}}{\mu g}\)
4
\(r\le \frac{\mu g}{{{\omega }^{2}}}\)