Why do balls bounce higher on hard floors than on carpet? a) They don't. That is a myth.
b) The carpet friction creates thermal energy.
c) The carpet fibers attract the molecules in the ball.
d)The carpet is so nice and soft the ball doesn't want to go.

Answer is B

The friction causes the ball to lose energy on carpets, which makes the ball bounce less. On hard floors, not as much thermal energy is lost, which is why it bounces higher.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.