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Gears:They are used in bicycle to gain speed faster and to paddle less it is very useful as it requries very less energy,it is very ueful in moumains as there are very steep slopes and if we put gears it is easier to paddel.

by mukul thakur (SHIMLA,HP)
For transmitting rotational torque.
You could use gear for putting a wheel thing.
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7y ago
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11y ago

They make cars and bikes work.

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Q: Why are gears useful?
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