College Physics (4th Edition)

The golf ball begins its upward climb with a kinetic energy of $\frac{1}{2}mv_0^2$. As the height increases, the kinetic energy is gradually converted into gravitational potential energy. On the way down, the gravitational potential energy is converted back into kinetic energy. By conservation of energy, the sum of the kinetic energy and the gravitational potential energy is a constant value and the constant value in this case is a positive value. The correct answer is: (b)