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A uniform disc is released from the top ...

A uniform disc is released from the top of a rough inclined plane of angle `theta` and height h. The coefficient of friction between the disc and the plane is `mu= tan theta/4`. The speed of centre of mass of disc on reaching the bottom of the plane is

A

`√(4gh/3) `

B

`sqrt(3gh/2) `

C

`sqrt(3gh/4) `

D

`sqrt(2gh/3) `

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