A Styrofoam ball of the same size as the lead ball takes a longer time to reach the ground. Which of the following is a good explanation for this? Briefly, describe your reasoning
1) Air resistance is a significant force in this problem.
2) The force of gravity does not act on the Styrofoam ball.
3) There is a gravitational force between the ball and the building.
4) The force of gravity on the Styrofoam ball is less than that on the lead ball.
5) The student did not release the Styrofoam ball correctly. (I claim the answer is not “any of these”, one of them really does best explain the reason!)