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A body is moving in a vertical circle of...

A body is moving in a vertical circle of raius `2r` such that, the string is just taut at its highest point. The speed of the particle when the string is horizontal, is

A

`sqrt(gr)`

B

`sqrt(gr)`

C

`sqrt(6gr)`

D

`sqrt(5gr)`

Text Solution

Verified by Experts

The correct Answer is:
C
Since `v^(2)=u^(2)-2gh`

`:.v^(2)=10gr-4g(4)impliesv^(2)=6gr`
`implies v=sqrt(6gr)`
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