Item NG004004: Gravitational potential energy is transformed into motion energy as a rock falls from a cliff.

A rock falls from a cliff to the ground below. As it falls, its speed increases. Is energy transformed while the rock is falling?  Explain.

  1. Yes, kinetic energy (motion energy) is transformed into gravitational potential energy as the rock falls.
  2. Yes, gravitational potential energy is transformed into kinetic energy (motion energy) as the rock falls.
  3. No, because the rock lost all of its gravitational potential energy once it started to move.
  4. No, because one form of energy cannot be transformed into another form of energy.