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

8th Class Science Friction Question Bank Friction HOTS Objective Problems

  • question_answer
    The joints of Latifs garage door are producing sound. To solve this problem, he must apply

    A)  Saw dust in the joints of the door

    B)  Water in the joints of the door

    C)  Sand in the joints of the door

    D)  Oil in the joints of the door

    Correct Answer: D

    Solution :

      The joints of the door are producing sound because of an increase in friction between the two surfaces. To reduce this, he must apply oil between the joints of the door. Application of oil helps in reducing surface irregularities and hence, reduces friction. This is because oil is a very good lubricating agent. The correct answer is D.


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