Gerardo tosses a ball straight up. Neglecting air resistance, which of the following choices best describes the forces acting on the ball after it leaves gerardo's hand but before it reaches its peak? a) The upward force gets smaller as the ball rises. b) The upward force is constant but weaker than the gravitational force. c) There's a downward gravitational force only. Explain your choice and draw a free body diagram of the situation stated in the problem.