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A slender uniform rod of mass M and leng...

A slender uniform rod of mass M and length l is pivoted one end so that it can rotate in a vertical plane (see figure). There is negligible friction at the pivot. The free end is held vertically above the pivot and then released. The angular acceleration of the rod when it makes an angle `theta` with the vertical is

A

`(3g)/(2l)sin theta`

B

`(2g)/(3l) sin theta`

C

`(3g)/(2l) cos theta`

D

`(2g)/(3l) cos theta`

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