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  3. 8th Class
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  5. Friction

8th Class Science Friction Question Bank Friction Formative Objective Problems

  • question_answer
    A thief sneaked into Larry's house. As he opened the door to Larry's room, the door made a squeaking noise. The noise alerted Larry and the thief was caught. The squeaking sound of a door can be reduced by                                         

    A)  Using ball bearings in the door hinge           

    B)  Using a lubricant on the door hinge

    C)  Using a lever to open the door

    D)  Using a gear to open the door

    Correct Answer: B

    Solution :

      A lubricant reduces friction. Hence, using a lubricant on the door will ensure that it will open more easily and not make a squeaking sound. The correct answer is B.


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