A. The work done by Earth on a ball as the ball, which was initially at rest, falls 3.0 m down towards Earth. B. A eastward force is applied to an eastward moving soccer ball that is already moving at a constant velocity to increase its speed in that direction. C. A cart is moving at a constant velocity of 10 m/s [ when a 0.5 N [downwar force is applied. D. The work done by Earth on an arrow as it is fired 200 m straight up into the air. E. Earth applies a force on the Moon as the Moon travels one completion rotation in orbit around Earth.