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A small block of mass m is released from...

A small block of mass `m` is released from a fixed smooth wedge in figure. Initial point is marked as `A`. Bottom of wedge is marked as `B` and at a point `C` the block stops because the straight part of floor is rough.

Work donw by normal reaction is zero during the motion of the block

A

from point `A` to `B` only

B

from point `B` to `C` only

C

from `A` to `C`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
The normal reaction is always `_|_` to surface and the displacement is always along the surface.
`:. ` froce and displacement are `_|_` to each other . From `A` to `C` it is zero.
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