Complete the statement. Assume that the water balloon's mass did not change.
The gravitational potential energy stored between the water balloon and Earth () as the water balloon fell toward Ben.

 - increased
 - decreased
 - stayed the same
Think about how the distance between the water balloon and the center of Earth changed.
Ben was lower than the balcony. As the water balloon fell toward Ben, the distance between the water balloon and the center of Earth decreased. So, the gravitational potential energy stored between the water balloon and Earth decreased as the water balloon fell toward Ben.