A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 Joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 Joules. Air friction is negligible. The maximum height 'h' reached by the ball is most nearly 1. h = 30 m 2. h = 50 m 3. h = 10 m 4. h = 20 m 5. h = 40 m (all answers are approximate) haha, I think I finally figured it out, but let me make sure if I'm right. I'm thinking that since both the Potential Energy and Kinetic energy are equal, that means that the ball is half way through it's path, right? So that should mean that the height is 20 meters. Am I correct?