Energy http://scienceline.ucsb.edu/getkey.php?key=3948 Potential Energy = mgh m=mass g=gravity h=height from ground Kinetic Energy = 0.5mv^2 v=velocity     There are many types of energy, but the two main types used in volleyball are potential and kinetic energy. It is very important to note that energy can neither be created or destroyed. For example, the reason why the ball does not bounce to the initial height is due to energy transforming into other types of energy such as thermal energy. The higher the ball is from the ground, the more potential the ball has. As the ball starts falling, the potential energy turns into kinetic energy. This relation shows that kinetic and potential energy is inversely proportional. A volleyball will have the most kinetic energy right before it hits the ground, and will have a potential energy of zero.