Taryn is playing with a bouncy ball. she notices that the ball seems to travel faster on its way back toward the ground than on its way up into the sky. why would the ball go slower moving away from the ground? a. because the ball must move against the force of earth's magnetic field on the way up b. because the ball must move against the force of earth's gravitational field on the way up c. because the ball moves with the friction force of air molecules on the way down d. because the ball moves with the elastic force of air molecules on the way down