The law of conservation of energy
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The document discusses the law of conservation of energy and how it applies to a marshmallow slingshot experiment. It explains that the law states that energy cannot be created or destroyed, only changed from one form to another. When a rubber band is pulled back, the energy from your fingers is stored as elastic potential energy. When released, this stored energy is transformed into kinetic energy that propels the marshmallow. The kinetic energy is then changed to heat energy when the marshmallow stops moving. So the original energy input is not lost, but merely changed between different forms.
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law of conservation of energy
Energy can be transformed from one form to another but cannot be created or destroyed. This is known as the law of conservation of energy. Energy exists in many forms including kinetic, potential, chemical, heat, light, and electrical. Examples of energy conversions include solar panels converting sunlight to electricity, plants converting sunlight to chemical energy through photosynthesis, and car engines burning fuel to change chemical energy to heat then mechanical energy through motion. The total quantity of energy always remains the same even as it changes form through various conversions and transformations from one type to another.
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The law of conservation of energy
- 1. The Law of Conservation of Energy Cam-Tu Diep Beatties Ford Road Library
- 2. The law of conservation of energy The law of conservation of energy states that energy can neither be created nor destroyed.
- 4. Materials Needed Medium size marshmallows. Circular Rings (prescription bottles cap rings, or any round ring items). Different size/color rubber bands. Markers to decorate the marshmallows (temporary paper tattoo also work on marshmallow).
- 5. How to tie the rubber band
- 7. When you stretch a rubber band the energy from your fingers is stored in the rubber band. When you let the rubber band go. The stored-up energy changes to energy in motion.
- 8. The Law of Conservation of Energy The science behind the fun is called TRANSFORMATION OF ENERGY. When you pull the rubber band back, you are doing WORK on the rubber band. How much WORK you do depends how hard you pull on the rubber band (FORCE) and on how far back (the DISTANCE) you pull the rubber band. WORK=FORCE X DISTANCE. The work you do is stored as ELASTIC ENERGY in the rubber bands. When you release the rubber band, the rubber band then does WORK on the marshmallow and the ELASTIC ENERGY is transformed into what is called KINETIC ENERGY (the energy of motion) in the flying marshmallow. When the marshmallow hits something and stops, the KINETIC ENERGY is then transformed into heat, or HEAT ENERGY. In other words, the ENERGY you produce by pulling back on the rubber bands isn’t lost. It’s just transformed from one kind of energy to another.
- 9. Books that can be use in program or for display Forms of energy / Anna Claybourne Energy / Tim Clifford Energy / Andrew Dean Foland. Energy / by Christine Webster.
Editor's Notes
- http://library.thinkquest.org/2745/data/lawce1.htm
- http://kitchenpantryscientist.com/?p=1774