FrictionHardBloom L3

Question

In the arrangement shown, horizontal surface is smooth, but friction is present between the block and the surface of the wedge. Block is given velocity v0 at t = 0. After achieving height ‘h’ on the wedge, block comes to rest with respect to wedge at t = t0. Then from t = 0 to t = t0 :

Options

A.Work done by friction on the block is negative
B.Work done by friction on the wedge is negative
C.Work done by block on the wedge is positive
D.Work done by wedge on the block is positive

Solution

Sol. Since kinetic energy of block decreases.

Since kinetic energy of wedge increases.


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