Suppose I have a tennis ball of COR 0.5. This means that when it bounces on an immovable object (like a floor), then it will return with 0.5x the velocity, right?
Now suppose I also have a football of COR 0.8. If I bounce the tennis ball on the football, how much energy will be lost? Say the football is on the ground and I drop the tennis ball from a height of 1m, how high will it bounce (assuming that it bounces straight up)?