Objects become electrically charged as a result of the transfer of

What is the measurement of how fast an object moves relative to a reference point?

What property of an object determines its inertia?

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.