Rebound in collision with an object construct

Hello guys, I had already written, the beginner and unfortunately I ran into this trouble and I can not get out.

How can I do that two objects collide with each other one of them rebounds?

(For example, as a player who bounces the ball on the head)

Thank You

try this demo

Thank you very much, your example is very useful. Only that I would need that the ball bounces in all directions, and not only fixed linearly. What action should I add?

Okram92 easy all you do is set angle to int(random(360))