Why so some objects bounce back up after they hit something?
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Usually things that bounce are compressible, like rubber. When it bounces it deforms itself against whatever surface it is that it hits. And when it does this, those atoms want to return to their normal structure, this “return” effect is what makes the bounce, like compressing a spring and letting go of it. When it snaps back to shape it’s exerting a force off of the surface it hit. This is why trampolines work, you are stretching the fabric and the springs and they want to go back to their original position, his effect moves you into the air. The more tension there is between atoms the more dramatic the launch effect is.
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