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 blockA. from point `A` to `B` onlyB. from point `B` to `C` onlyC. from `A` to `C`D. none of these

A small block of mass `m` is released from a fixed smooth wedge in fig

1.	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 blockA. from point `A` to `B` onlyB. from point `B` to `C` onlyC. from `A` to `C`D. none of these
Answer» Correct Answer - 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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