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The upper half of an inclined plane of i...

The upper half of an inclined plane of inclination `theta` is perfectly smooth while lower half is rough . A block starting from rest at the top of the plane will again comes to rest at the bottom , if the coefficient of friction between the block and lower hald of the plane is given by

A

`mu = sintheta`

B

`mu = cottheta`

C

`mu = 2costheta`

D

`mu = 2tantheta`

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The correct Answer is:
D
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AAKASH INSTITUTE-MOCK TEST 7-Example
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