Question

When a ball bounces from a given height it does not come back up all the way. The energy difference goes to:

Question options:

Sound

Shape change during the bounce

Heat

Gravity variations

Air friction

Deformation of the ball

Answer 1

When a ball bounces from a given height it does not come back up all the way. The energy difference primarily goes to AIR FRICTION, it is so because the air friction retards the downward motion during the downward motion and then retard the upward motion during the bounce back .

Apart from this some fraction of energy is also released in the form of heat and sound , once the ball strikes with the floor, but their contibution is quite feeble.

There is no concept such as gravity variations upto a height of about 100 km above the surface of the Earth.

Therefore, the correct answer out of the given options is : AIR FRICTION.

If more than one option is to be selected , then Sound and Heat will also be a factors contibuting to the loss of energy.