Q 1419601519.     One end of `a` uniform rod of length `l` and mass `m` is hinged at `A`. It is released from rest from horizontal
position `AB` as shown in figure. The force exerted by the rod on the hinge when it becomes vertical is

A

`3/2 mg`

B

`5/2 mg`

C

`3 mg`

D

`5 mg`

HINT

From conservation of mechanical energy. `text(Decrease in gravitational potential energy) = text(Increase in rotational kinetic energy about A)`

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