During the process of classical conditioning, the neutral stimulus (ns) is converted into the a. conditioned stimulus b. conditioned response c. unconditioned stimulus d. unconditioned response

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.