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A uniform rod of mass m and length l is ...

A uniform rod of mass m and length `l` is hinged at upper end. Rod is free to rotate in vertical plane. A bail of mass m moving horizontally with velocity `v_0` collides at lower end of rod perpendicular to it and sticks to it. The minimum velocity of the ball such that combined system just completes the vertical circle will be

A

`2[sqrt(2gl)]`

B

`sqrt(2gl)`

C

`2[sqrt(gl)]`

D

`sqrt(gl)`

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The correct Answer is:
B
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