* Gravity: There would be a downward arrow representing the force of gravity acting on the ball.

* Air Resistance: Air resistance is a force that opposes the motion of the object through the air. Since the ball is falling, the air resistance acts upward, opposite to the direction of motion. This would be represented by an upward arrow on the free body diagram.

Therefore, a free body diagram of a ball falling with air resistance would show both downward and upward arrows.