Complete the statement. Assume that the mole's mass did not change.
The gravitational potential energy stored between the mole and Earth () as the mole dug toward the surface.
A: increased
B: stayed the same
C: decreased
Think about how the distance between the mole and the center of Earth changed.
The surface of the ground is higher than the underground burrow. As the mole dug toward the surface, the distance between the mole and the center of Earth increased. So, the gravitational potential energy stored between the mole and Earth increased as the mole dug toward the surface.