A ball moving with speed v normally towards a moving wall approaching it with speed u. The final speed of ball is (the collision is perfectly elastic)
Question
Solution 1
The collision between the ball and the wall is perfectly elastic. In a perfectly elastic collision, the relative speed of approach is equal to the relative speed of separation.
Let's denote:
- Initial speed of the ball = v
- Speed of the wall = u
- Final speed of the ball = v'
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