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The u p p er half of an in clin ed p lan...

The u p p er half of an in clin ed p lane of inclination `theta` is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by

A

`2 tan phi`

B

`tan phi`

C

`2 sin phi`

D

`2 cos phi`

Text Solution

Verified by Experts

The correct Answer is:
A
2 tan `phi`
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