1.

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 :

Answer»

`TAN ALPHA mg COS THETA`
zero
`mg SIN theta`
`tan alpha mg sin theta`

Answer :c


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