A uniform flexible chain of mass m and l...

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

`sqrt(3 gl)`

`sqrt(2g)`

`sqrt(gl)`

`sqrt(4g)`

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