Two balls with the same mass and size - one of rubber, one of clay - are release

Question

Two balls with the same mass and size - one of rubber, one of clay - are released from the same height above the flat floor. The rubber ball bounces up and down a few times before coming to rest. In tum, the clay ball just hits the floor and stops without bouncing. Which of the two experienced a smaller average force while coming to rest? a) The rubber ball b) The clay ball c) Both experience the same average force d) It depends on the actual size of the balls e) It depends on the number of bounces performed by the rubber ball: the larger the number, the larger the force

Explanation / Answer

since impulse J = Favg*dt = change in momentum

every time bouncing of the rubber ball there is less change in momentum when compare with the momentum of the clay ball

So the clay ball will experience larger average force

the required answer is a) the rubber ball

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