A ball of mass m approaches a wall of mass M (>> m) with speed 4 m/s along the normal to the wall. The speed of wall is 1m/s towards the ball. The speed of the ball after an elastic collision with the wall is -
Text Solution
Verified by ExpertsThe correct answer is:
D
Let v be the velocity of ball after collision, collision is elastic
e =1
Or relative velocity of separation = relative velocity of approach
v – 1 = 4 + 1
or v = 6 m/s (away from the wall)
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