Competency #1
Answer and Explanation
Force of gravity of the earth acting on the ball, which is greater than the force of gravity of the moon acting on the ball.
Applied force: There is no applied force in this case, as the question is for the time after the ball is released.
Friction force and Support force: There is not a friction force or support force acting on the ball because it is not in contact with anything.
Air Resistance force: There is no air resistance force because there is no air present.
Gravity force: There is a force of gravity between any two masses. Therefore, there is a force of gravity between the earth and the ball, and between the moon and the ball. Due to the large distances between the masses in this case, the forces of gravity are quite small. However, these are the largest 2 forces that have been identified acting on the ball.
By looking at Newton's Law of Universal Gravitation, we see that the force of gravity of the earth on the ball must be larger than the force of gravity of the moon on the ball, since the earth has more mass than the moon and the earth-ball distance is the same as the moon-ball distance.