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Energy Energy Conversions Energy Conversion • A change from one form of energy to another. Qui ckTime™ and a TIFF (U ncompr essed) decompressor are needed to see thi s pi cture. Example • Pendulum - Starts as potential energy, as it swings downwards it changes to kinetic energy, when it hits its lowest point it goes back to potential energy, as it swings upwards it is kinetic energy and when it hits its highest point again it turns into potential energy. QuickTime™ and a TIF F (Uncompressed) decompressor are needed to see this picture. Example #2 QuickTime™ and a TIFF (Uncompress ed) dec ompres sor are needed to s ee this pic ture. • Rubber band - Starts as potential energy until you stretch it, it turns into kinetic energy. When you have stretched to its maximum elasticity it turns back into potential energy and when you let go it turns back into kinetic energy. Example #3 • Soccer ball - When the ball is resting on the ground it has potential energy. When a player kicks the ball the potential energy is turned into kinetic energy. As the ball rolls it slows down and eventually stops returning to a state of potential energy. QuickTi me™ and a TIFF ( Uncompressed) decompressor are needed to see thi s pi ctur e. Example #4 • Running: Quic k Ti me™ and a T IFF (Unc om pres s ed) dec om pres s or are needed to s ee t his pic t ure. Sun (light) --- tree (chemical) --- fruit (chemical) --- person eating fruit (chemical) -- person running (mechanical) Example #5 • Hair dryer: Electrical outlet (electromagnetic) -- hair dryer (sound, thermal, light) QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. Example #6 • Light Bulb: QuickTi me™ and a T IFF (Uncom pressed) decom pressor are needed to see t his pict ure. Electrical wiring (electromagnetic) -- light bulb (light, thermal) Example #7 • Golf Player: Stored lunch (mechanical: potential) --- swinging the club (mechanical: kinetic) --- ball flying (mechanical: kinetic, sound) QuickT ime ™an d a TIFF ( Uncomp res sed) deco mpre ssor ar e need ed to see this pictur e. Law of Conservation of Energy • Energy cannot be created nor destroyed. • It can be transferred from one object to another.