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Energy Notes Energy is the ability to do work. The six types of energy are: 1. kinetic 2. potential 3. Thermal 4. nuclear 5. electrical 6. chemical Definition of Potential Energy- Energy due to position or stored energy Examples of Potential energy are: Stretching a rubber band,Water at the top of a waterfall, Yo–Yo in held in your hand, Drawing a Bow Gravitational Potential Energy is energy due to an objects height above the ground A waterfall, high dive diver, and a falling snowflake all have gravitational potential energy. Things that are positioned higher have more potential energy Heavier things have greater potential energy. Energy that is stored due to being stretched or compressed is called elastic potential energy. A sling shot, bow and arrow and springs all have elastic potential energy. Definition of Kinetic Energy is energy of motion. • The faster an object moves, the more kinetic energy it has. • The greater the mass of a moving object, the more kinetic energy it has. • Examples of Kinetic Energy are: Shooting a rubber band, water falling over the fall, a Yo-Yo in motion, releasing the arrow from the bow. The Law of Conservation of Energy Energy can be neither created nor destroyed by ordinary means. It can only be changed from one form to another. If energy seems to disappear, then consider that energy might have been changed to sound, heat or light All forms of energy can be converted into other forms The sun’s energy through solar cells can be converted directly into electricity. Green plants convert the sun’s energy (electromagnetic) into starches and sugars (chemical energy). In an electric motor, electromagnetic energy is converted to mechanical energy. In a battery, chemical energy is converted into electromagnetic energy. The most common energy conversion is the conversion between potential and kinetic energy When stored energy begins to move, the object now transfers from potential energy into kinetic energy. Energy Homework What does the law of conservation of energy state? At your home, roll a ball off a table. Draw a picture of the ball bouncing for a couple of bounces. Label at least 3 areas where potential energy is high. Label three areas where potential energy is low. Label 3 areas where kinetic energy is high. Label three areas where kinetic energy is low. Label two areas where kinetic and potential energy are about equal. List three ways energy from the bouncing ball was transferred to other places.