What points is the energy diagram representing?

Question

A ball is thrown in the air. The corresponding energy bar diagram is shown above.

What point(s) in the ball’s path could the energy bar diagram be representing?

Answer 1

So, we know that the graph is showing the situation where the ball has no gravitational potential energy; thus, the totality of its energy is kinetic. Keep in mind that the total energy of the ball (ignoring air resistance) is conserved; thus, since we know that E=KE+GPE and that GPE=0, then E=KE. Now, we know that GPE increases the further from the ground that we are. When we are at ground level, then GPE=0. Therefore, the only point that corresponds to the shown graph is point F.