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A block is projected with velocity `v_(0)` up the inclined plane from its bottom at `t=0`. The plane makes an angle `theta` with the horizontal. If the coefficient of friction between the block and the incline is `mu = tan alpha(alpha gt theta)` then fricitonal force applied by the plane on the block for `t gt (v_(0))/(g[sin theta+tan alpha cos theta])` will be :

A

`tan alpha mg cos theta`

B

zero

C

`mg sin theta`

D

`tan alpha mg sin theta`

Text Solution

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The correct Answer is:
c
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