Why doesn't a bouncy ball transfer all its energy into the

>>8608656
Things don't want to be deformed. When they get deformed, they bounce back. This is what transfers force back to the ball. The floor bounces back.

>>8608656
I'm not sure this will help you since I never thought it was counterintuitive but this its just law of conservation of the movement ( p = mv ), since it's impossible to move the earth from it's surface, it has to go back somewhere, which is in the ball.
I couldn't go deeper in the explanations since I HATE chemistry, but from a molecular point of view this also totally make sense,
when the ball hits the wall ( or the ground ), it gets distorted : every molecules suddenly gets closer, and I find pretty natural that the ball want to regain it's relaxed position the most efficient way possible.

>>8608704
>every molecules suddenly gets closer, and I find pretty natural that the ball want to regain it's relaxed position the most efficient way possible.

Correct, the energy imparted into the molecules is released in the form of motion as they resist compression. That's why you can't bounce a ball made of glass as the molecules don't contract and expand, they just shatter the strength of bonds holding them together is exceeded far beyond their ability to deform.

>>8608704
The conservation law you're looking for is the conservation of momentum and it implies the complete opposite. Momentum is transferred to the Earth, it just has no practical effect since the Earth's mass is enormous compared to the bouncy ball.

In fact, the ball bouncing back away from the Earth imparts a GREATER magnitude of momentum to the Earth, since the net momentum must still be toward the Earth--it's conserved.

Conservation of kinetic energy is also called an 'elastic' collision, but real bouncy balls do not undergo elastic collisions--they eventually stop bouncing or don't bounce all the way up to their initial height.

>>8608656
>why are elastic materials elastic
bcoz elastic