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Question
A ball of mass m collides horizontally with a stationary wedge on a rough horizontal surface, in the two orientations as shown. neglect friction between the ball and the wedge. The students comment on the system of ball and wedge in these situations.
Saurav: Movements of the system in x-direction will change by significant amount in both the cases.
Rahul: There are no impulsive external forces in x-direction in both cases, hence the total momentum of the system in x-direction can be treated as conserved in both cases.
A ball of mass m collides horizontally with a stationary wedge on a rough horizontal surface, in the two orientations as shown. neglect friction between the ball and the wedge. The students comment on the system of ball and wedge in these situations.
Saurav: Movements of the system in x-direction will change by significant amount in both the cases.
Rahul: There are no impulsive external forces in x-direction in both cases, hence the total momentum of the system in x-direction can be treated as conserved in both cases.
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Solution
The correct option is D Both are incorrect
Both of them are incorrect because Saurav says that the momentum will change drastically in both the Cases but in the second case the impact is going to be relatively less because of angle at which the mass strikes the wedge, Rahul is incorrect because, for the second case, momentum will be conserved if we take both x y-axes, not ONLY x.
Both of them are incorrect because Saurav says that the momentum will change drastically in both the Cases but in the second case the impact is going to be relatively less because of angle at which the mass strikes the wedge, Rahul is incorrect because, for the second case, momentum will be conserved if we take both x y-axes, not ONLY x.
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