R

Ram Sharma • 193.84K Points
Coach Science 

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

  • (A) The effective area of contact between the wheel and axle is increased
  • (B) The actual 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 these
Correct Answer - Option(C)

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