Kinetic and Protential Energy
Kinetic enerygy is the energy of motion. The kinetic energy of an object is the energy it possesses because of its motion.
A ball rolling down a hill has kinetic energy.
Potential energy: potential energy is the energy stored in an object due to its position in a force field or in a system due to its configuration.
Right before a ball rolls down a hill it has Potential energy.
This is a good example of Kinetic and Potential energy. Watch the little dudes ride on the roller coaster!
Here's the final video!