question_answer 44)

                  Two identical solid balls, one of ivory and the other of wet-clay, are dropped from the same height on the floor. Which one will rise to a greater height after striking the floor and why?                

Answer:

                  Ivory ball will rise to a greater height after striking the floor. This is because, ivory ball is move elastic than the wet clay ball. Therefore, ivory ball will regain its original shape immediately after the collision only if it has more energy after collision.