A unifrom rod AB of length l,and mass m ...

A unifrom rod AB of length l,and mass m is free to rotate about point A.The rod is release from rest in the horizontal position Given that the moment of inertia of the rod about A is `(ml^2)/3`, the initial angular acceleration of the rod will be:

`(3g)/21 `

`(2g)/31`

`mg1/2`

`1/2gl`

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