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A uniform rod ofmass M and length L is...

A uniform rod ofmass M and length L is hanging from its one end free to rotate in a veritcal plane.A small ball of equal mass is attached of the lowe end as shown. Time period of small oscillations of the rod is

A

`2pi sqrt((2L)/(3g))`

B

`2pi sqrt((4L)/(3g))`

C

`2pi sqrt((8L)/(3g))`

D

`2pi sqrt((L)/(g))`

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