Diagram shows a wedge kept on a rough surface. A ball of mass ‘m’ is dropped on the slant face of the wedge. If the collision is perfectly elastic, choose the CORRECT statement(s):

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The ball of mass ‘m’ may jump to the same maximum height from the point of impact for some values of $θ$ except $0^{\circ}$ .

We can choose some axis such that momentum of system (M+m) is conserved along that axis.

Momentum of the system (M+m) can be conserved in horizontal direction.

Friction acting between wedge and ground is impulsive in nature.

answer is B, D.

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Detailed Solution

Friction at the horizontal surface will be impulsive in nature momentum of the system will not be conserved in horizontal direction.
Momentum of the system (M+m) will not be conserved in horizontal direction.
Momentum of the system (M+m) will be conserved in the direction to the net impulsive (normal+friction) force.

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