A Super ball is dropped from a height h onto a hard steel plate (fixed to the Earth), from which it rebounds at every nearly its original speed.
(a) Is the momentum of the ball conserved during any part of this process?
(b) If we consider the ball and Earth as out system, during what parts of the process is momentum conserved?
(c) Answer part (b) for a piece of putty that falls and sticks to the steel plate.