If an equation is already balanced, how would you express that in an answer? A. Write 'balanced as written.'
B. Add a tick next to it.
C. Do not write anything next to it.

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.