Unbalanced forces:

You have to have more applied force than friction. There would have to be more gravity than air resistance or the ball would never come back down.

Gravitational Potential energy

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Elastic Potential energy

Elastic potential energy increases when the pitcher stretches to throw the ball.

Gravitational Potential energy increases when the ball flies in the air. It also imcreases when the batter jumps to run to a base.