Ball bearings are used in cycles cars etc Because ........

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Ball bearings are used in cycles, cars etc. Because:

actual area of contact between wheel and axle is increased

effective area of contact between wheel and axle is increased

effective area of contact between wheel and axle is reduced

None of the above statements is correct

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Explanation:

The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft).