2. Questions Bank
  3. 8th Class
  4. Science
  5. Friction

8th Class Science Friction Question Bank Friction Conceptive Objective Problems

  • question_answer
    In order to reduce the friction of a wheel-axle, a bicycle uses

    A)  gears                   

    B)  brakes

    C)  pedals                 

    D)  ball bearings

    Correct Answer: D

    Solution :

      We know that ball bearings are rolling element bearings used to reduce friction. Ball bearings are used in the pedals of a bicycle as well as in the front and rear wheel-axles to reduce its friction. The correct answer is D.


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