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A rod of length / is held vertically sta...

 A rod of length / is held vertically stationary with its lower end located at a point P, on the horizontal plane. When the rod is released to topple about P, the velocity of the upper end of the rod with which it hits the ground is

A

`sqrt((g)/(l))`

B

`sqrt(3gl)`

C

`3sqrt((g)/(l))`

D

`sqrt((3g)/(l))`

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