A ball bounces because it is elastic. As it hits a surface it pushes back and the surface also pushes it away, following Sir Isaac Newton's law of motion that states that with every action, there is an equal and opposite reaction.
Different balls bounce differently because of the materials they are made from. When a ball is in motion, gravity acts upon the ball, giving it kinetic energy. When the ball hits an object, the kinetic energy has to be displaced in some way. This displaced energy causes the ball to become deformed. The act of reforming back into the ball shape is what gives the ball its bounce, and its material make-up is what makes the reformation and bounce stronger or weaker.Learn More
Mass affects a ball's bounce through kinetic energy. The more mass an object has, the more kinetic energy it has when dropped, due to gravity.Full Answer >
Increasing a ball’s air pressure increases its bounce. The more air there is inside a ball, the more it resists deformation when it meets a rigid object, enabling it to bounce more elastically.Full Answer >
Rubber balls bounce due to the release of pressure from rubber’s molecules. When rubber meets a stationary object, it builds compressed energy and releases upwards to regain form.Full Answer >
According to the U.S. Department of Energy, balls made of elastic materials such as rubber bounce because the material stretches and deforms when they hit a surface and then reform back into their original shapes, which releases energy into a kinetic form, causing the rubber ball to bounce.Full Answer >