![]() ![]() Carefully cut a piece of corrugated cardboard that is slightly longer and wider than the length of one straw.Flat, hard surface for testing your car.Four CDs (that are okay to get scratched).The following is a suggested list of materials, but you can substitute different ones.) (Note: This is an engineering design project. It will take a little engineering to get your vehicle working-challenge yourself to see how far your car can go! Your model car will use a rubber band as the source of energy. In real cars, gasoline’s chemical energy or the electrical energy in a battery is converted to kinetic energy of the moving car. If you launch a rubber band across the room, the potential energy is converted to kinetic energy, the energy of motion.īut what about putting all that stored energy to use? You can attach your rubber band to a simple machine-a wheel and axle-to build a simple rubber band–powered car. When you release it all, that stored energy has to go somewhere. Specifically it stores elastic potential energy-the type of energy stored when a material is deformed (as opposed to gravitational potential energy, the type you get when you raise an object off the ground). When you stretch a rubber band it stores potential energy. Did you ever suspect that rubber bands could also be a fun way to learn about physics and engineering? Find out in this project where you’ll build a rubber band–powered car. Admit it, you’ve probably launched a rubber band at least once-pulled one end back, and let it go flying. ![]()
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