4 The gravitational field strength on the Moon is less than on the Earth. Which of
these is different when done on the Moon compared with when done on the
Earth?
A the gravitational potential energy gained by a stone lifted through the same
vertical height
B the kinetic energy gained by a ball when hit with the same force for the same
period of time
C the momentum gained by a bullet when fired from the same gun
D the work done in accelerating a stone from rest to the same speed