why wheels are circular
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Wheels are circular for the ability to go smoothly and have less friction as compared to other shapes. It also will help a person to turn the wheel sideways too.
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Answer:
When a system is in motion, two different principle types of friction act on it that is sliding and rolling friction. Rolling friction is always smaller than sliding friction. This is the reason, the wheels of automobiles are made circular in shape.
This shape helps to reduce or to minimize the friction.
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