What happens to the energy of the ball from when t = 0 s to when t = 5 s? A. Potential energy decreases and kinetic energy increases, but the total amount of mechanical energy remains the same. B. Potential energy increases and kinetic energy decreases, but the total amount of mechanical energy remains the same. C. Potential energy and kinetic energy both increase, and the total amount of mechanical energy increases. D. Potential energy and kinetic energy both decrease, and the total amount of mechanical energy decreases.