Question

A body a moves towards a wall with velocity v. The wall b also moves towards the body a with velocity . After collision, the body moves in opposite direction with velocity which is times the velocity v. Find the coefficient of restitution:

Answer 1

we know that
velocity of body before collision = velocity of body after collision
the body a moves opposite in direction because the wall b has high velocity than the body a
then, after collision the body moves in opposite direction but the average velocity of both bodies are constant after collision