Susan and Jamal are playing volleyball. Susan spikes the ball. When she strikes the ball with her fist, it flies into the air and over the net. Eventually, it falls down and lands on the ground. Jamal is unable to get to the ball in time to hit it back over the net. Susan gets a point!

How was Susan able to overcome and work with gravity to score a point? Be sure to explain the positive and negative actions taking place in this scenario.