A) \[r=\mu g{{\omega }^{2}}\]
B) \[r<\,\,\frac{{{\omega }^{2}}}{\mu g}\]
C) \[r\le \,\,\frac{\mu g}{{{\omega }^{2}}}\]
D) \[r\ge \,\,\frac{\mu g}{{{\omega }^{2}}}\]
Correct Answer: C
Solution :
The coin will revolve with the record, If force of friction \[\ge \] centrifugal force \[\mu mg\ge \,\,mr{{\omega }^{2}}\,\,\Rightarrow \,\,r\,\,\le \,\,\frac{\mu g}{{{\omega }^{2}}}\]You need to login to perform this action.
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