Momentum and CollisionHardBloom L5
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 ball and wedge. Two student comment on system of ball and wedge in these situations 
Saurav : Momentum of system in x-direction will change by significant amount in both cases.
Rahul : There are no impulsive external forces in y-direction in both cases hence the total momentum of system in y-direction can be treated as conserved in both cases.
Options
A.Saurav is wrong and Rahul is correct
B.Saurav is correct and Rahul is wrong
C.Both are correct
D.Both are wrong
Solution
Sol. 
No impulsive force (external) either in –ive x or is y-direction P ⇒ constant
N' ⇒ Impulsive ⇒ fr ⇒ Impulsive ⇒ Momentum well change
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