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Photo 2 from the Museum of Science and Industry
In this picture, Emily and I studied wheels and axles. They work because the wheel turns around the still middle, the axle. Since there is not much friction between the wheel and the axle, the wheel spins easily.
In a car, for instance, the steering wheel turns against the middle part, the axle. The turning wheel reduces the friction against the rubber wheel and the road by
Article posted April 30, 2010 at 10:56 AM •
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