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A ball of mass m approaches a wall of ma...

A ball of mass m approaches a wall of mass M `(gt gt m)` with speed 4 m/s along the normal to the wall . The speed of wall is 1 m/s towards the ball . The speed of the ball after an elastic collision with the wall is

A

`5 "m s "^(-1)` away from the wall

B

`9 "m s "^(-1)` away from the wall

C

`3 "m s "^(-1)` away from the wall

D

`6 "m s "^(-1)` away from the wall

Text Solution

Verified by Experts

The correct Answer is:
D
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