Complete the statement. Assume that the sled's mass did not change.
The gravitational potential energy stored between the sled and Earth () as Susan rode down the hill.

 - stayed the same
 - increased
 - decreased
Think about how the distance between the sled and the center of Earth changed.
The bottom of the hill was lower than the point where Susan started sledding. As Susan rode toward the bottom of the hill, the distance between the sled and the center of Earth decreased. So, the gravitational potential energy stored between the sled and Earth decreased as Susan rode down the hill.