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A coin is placed on a rotating platform ...

A coin is placed on a rotating platform at distance 'r' from its axis of rotation . To avoid the skidding of coin from rotating platform , the maximum angular velocity `omega ` is

A

`sqrt r//mu g`

B

`sqrt (mu g//r)`

C

`sqrt mu rg`

D

`(rg)/(mu)`

Text Solution

Verified by Experts

The correct Answer is:
D
Centripetal force =Force of friction
`mr omega ^(2)= mu mg , omega=sqrt(mu g //r)`
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