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  3. 8th Class
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8th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    Which one of the following type of frictions comes into play when a book kept on cylindrical pencils is moved by pushing?

    A)  Static friction    

    B)  Rolling friction

    C)  Sliding friction

    D)  both sliding friction and rolling friction

    E)  None of these

    Correct Answer: B

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