Item EG015003: The mass of a rock will affect the gravitational potential energy of a rock on top of a cliff.

A rock is resting on a flat surface at the top of a cliff. Which of the following always affects the amount of gravitational potential energy a rock has?

  1. Its mass
  2. Its shape
  3. How close it is to the edge of the cliff
  4. A rock cannot have any gravitational potential energy unless it is falling.