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Anonymous
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Asked: 2023-01-16T03:15:35+05:30 In:

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

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

Poll Results

0%(a) the actual area of contact between the wheel and axle is increased ( 0 voters )
60%(b) the effective area of contact between the wheel and axle is reduced ( 3 voters )
40%(c) the effective area of contact between the wheel and the axle is increased ( 2 voters )
0%(d) None of the above ( 0 voters )
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1 Answer

  1. Anonymous

    Ans (b) Ball bearings are used in bicycles, cars, etc. because the effective area of contact between the wheel and axle is reduced.

    Ball bearings are used to reduce friction. Friction is directly proportional to the effective surface area. So if the effective surface area is reduced then friction will also reduce.

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