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

8th Class Science Friction Question Bank Friction Conceptive Objective Problems

  • question_answer
    Joe slides a plank of wood over the floor. As the wood plank slides over the floor, its speed can be increased the most if

    A)  The floor is lubricated

    B)  It is coated with oil

    C)  Balls are placed under it

    D)  It is smoothed with sand paper

    Correct Answer: C

    Solution :

      In order to answer this question successfully, the student must understand that when balls are placed under the plank of wood, it rolls instead of sliding. Hence, its friction is the least and its speed increases the most. The correct answer is C.


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