Consider a ball tossed into the air. Point A shows the ball just after the release, and point D show it at the top of its flight.
Consider the following statements:
I. From points A to D, the kinetic energy is conserved.
II. From points A to D, the potential energy is conserved.
III. From points A to D, the sum of the kinetic energy and potential energy is conserved.
Which is true?