Newton’s law of universal gravitation states that the force of gravity

select one:
a. is stronger for objects that are closer together.
b. affects all objects in the universe.
c. is stronger for objects with more mass.
d. all of the above

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.