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    Physics
    Grade-9
    Easy

    Question

    In which of the column are the activities categorized correctly according to the advantages and disadvantages of the role of friction in them?

    1. Advantage
    2. Disadvantage
    3. Both
    4. None of them

    Hint:

    Walking and flying of airplanes are possible because of friction which are the advantages.

    The correct answer is: Advantage

      The column with advantages of friction is categorized correctly.
      • The activities like walking on a surface and flying of an airplane are made possible by friction.
      • These are categorized under the advantages of friction.
      • Writing on a blackboard is an advantage while wearing out of the shoes is a disadvantage of friction.

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