Potential energy is stored energy that an object has due to its position or chemical composition, while kinetic energy is the energy of motion. A roller coaster car has potential energy when at the top of a hill due to its elevated position, and kinetic energy when moving down the hill. The seven types of energy are chemical, light, heat, nuclear, mechanical, sound, and electrical, with examples of each type provided. Mechanical energy is demonstrated by a moving roller coaster, while a crashing and burning roller coaster would convert to heat energy. Substances like fuels have potential chemical energy that can be released through burning. Potential and kinetic energy can be converted between each other.