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A ring of radius R lies in vertical plan...

A ring of radius `R` lies in vertical plane. A bead of mass `'m'` can move along the ring without friction. Initially the bead is at rest the bottom most point on ring. The minimum horizontal speed `v` with which the ring must be pulled such that the bead completes the vertical circle.

A

`sqrt(3 gR)`

B

`sqrt(4 gR)`

C

`sqrt(5 gR)`

D

`sqrt(5.5 gR)`

Text Solution

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The correct Answer is:
B
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