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    Physics
    Grade-9
    Easy

    Question

    Which is the odd one out?

    1. Produces heat
    2. Causes wear and tear
    3. Climbing
    4. Stopping vehicles

    hintHint:

     Climbing is a voluntary action which is produced by the involvement of thoughts. It needs gravity.  

    The correct answer is: Climbing

      Based on the energy and frictional force, climbing is the odd one out.
      • Friction plays a significant role in all the activities of day-to-day life.
      • Various activities create various types of friction.
      • Heat production, stopping vehicles, and the activities causing wear and tear need external friction to be applied to an object.
      • On the basis of energy and frictional force, Climbing is a process where our body do a voluntary action which needs gravity.  

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