I have an example: Let us say you are on a large object with a mass of 5x10^10kg accelerating upwards at a constant velocity of 5m/s^-2, and there is a ball 0.1kg on top of that object. This ball should be accelerating at the same pace. The ball is then held up 5m from the surface of that object, and is let go. Would the ball stop accelerating and start moving at a constant velocity considering the downward forces are negligible. Further questions: -What force would this ball have when it is let go? -Would the large object ever reach the ball again? -If the ball does start moving at a constant velocity, when the large object reaches the ball, how large of a force will that object exert on the ball, and would this cause the ball to accelerate at what pace?