Q 1447767683.     A uniform flexible chain of mass `m` and length `2l` hangs in equilibrium over a smooth horizontal pin of negligible diameter. One end of the chain is given a small vertical displacement so that the chain slips over the pin. The speed of chain when it leaves the pin is

A

`sqrt(2gl)`

B

`sqrt(gl)`

C

`sqrt (4 g l)`

D

`sqrt(3 g l)`

HINT

Decrease in potential energy = increase in kinetic energy
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