In the image below, which objects would have a greater gravitational force between them, objects a and b, or objects b and c? give one supporting detail for your answer.

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.