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A small coin is placed at a distance r f...

A small coin is placed at a distance r from the centre of a gramophone record.The rotational speed of the record is gradually increased. If the coefficient of friction between the coin and the record is `mu,` the minimum angular frequency of the record for which the coin will fly off is given by :

A

`sqrt((2mug)/(r))`

B

`sqrt((mug)/(2r))`

C

`sqrt((mug)/(r))`

D

`2sqrt((mug)/(r))`

Text Solution

Verified by Experts

The correct Answer is:
C
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