Which ball will experience the greater change in temperature?

Question

A steel ball and a rubber ball of equal mass are at room temperature. Each is dropped from the same height on to a solid floor. The steel ball rebounds to a greater height than the rubber ball. Which ball will experience the greater change in temperature?

Answer 1

The one that rebounded to a lower height lost more kinetic energy in the form of heat than the other ball, so that is the one that had the higher temperature rise.  For this problem as stated, it is the rubber ball.