The gaint wheel is fitted to a rod at its centre. When the axle starts rotating, the wheel fitted to it starts rotating.
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"The giant wheel is a practical example of a wheel and axle.
Wheel and axle is a type of a simple machine in which a wheel is supported by a rod like structure called the axle.
In a giant wheel which is a famous merry-go-round, the wheel is fixed to a rod.
When the axle is moved, the wheel also starts moving in a circular motion at a high speed. "
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