A person drops one rock from rest and it falls 100 meters do…
A person drops one rock from rest and it falls 100 meters down a cliff before hitting the ground. The person then throws an identical rock downward. The amount of kinetic energy gained by the rock dropped from rest is ________ that of the second rock, and the magnitude of the change in speed (between hitting the ground and its intial speed) of the rock dropped from rest is ______ that of the second rock.