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A particle of mass m attached to the end...

A particle of mass m attached to the end of string of length l is released from the horizontal position. The particle rotates in a circle about O as shown When it is vertically below O, the string makes contact with a nail N placed directly below O at a distance h and rotates around it. For the particle to swing completely around the nail in a circle.

A

`h lt(3)/(5)l`

B

`h ge(3)/(5)l`

C

`h lt (2)/(5)l`

D

`h ge (2)/(5)l`

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The correct Answer is:
B
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