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

A body is moving in a vertical circle of radius r 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(2gR)`

C

`sqrt(3gr)`

D

`sqrt(4gR)`

Text Solution

Verified by Experts

The correct Answer is:
C
`v=sqrt(u^(2)-2gh)=sqrt(5gr-2gr)=sqrt(3gr)`
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