Why does an egg thrown with the same force break if you throw it at a wall and not break when it hits a sheet? (Why did the egg not break when it hit the sheet?)

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.