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New for SSC CGL students

Monday, 19 October 2015

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

Question 88 Ball bearings are used in bicycles, cars, etc., because

 A ) The actual area of contact between the wheel and axle is increased
 B ) The effective area of contact between the wheel and axle is increased
 C ) The effective area of contact between the wheel and axle is reduced
 D ) None of the statements is correct

Answer: The effective area of contact between the wheel and axle is reduced

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