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How to make a self propelled car?

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Twist the skewer in a circular motion toward the cardboard-stuck thumbtacks, which will wind up the rubber band. After two complete revolutions, set the car down on a flat surface, and release it. The stored energy of the rubber band will rotate the tires and propel the car forward. read more

You can build a self-powered car science project with objects such as a mouse trap or a balloon. Self-propelled cars are an example of physics, demonstrating kinetic energy. read more

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Dual Powered Rubber Band Powered Car - YouTube
Source: youtube.com