Ball bearings are used in bicycles, cars, etc., because

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CollectorBabu · Accepted Answer

Correct Answer: the effective area of contact between the wheel and axle is reduced. Ball bearing reduces rotational friction by reducing area of contact between the wheel and axle. In ball bearings the ball are spherical which are in contacts with the wheel and axle at a very small point making it to spin smoothly, which describes option C as correct.

Ball bearings are used in bicycles, cars, etc., because

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