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  5. Work, Force, Energy and Simple Machines

5th Class Science Work, Force, Energy and Simple Machines Question Bank Force Work and Energy

  • question_answer
    The given diagram shows a hill with four labelled positions W, X, Y and Z. When a ball is rolled down the hill, then from which position will it finish rolling with the greatest speed?

    A)  Position W                   

    B)  Position X        

    C)  Position Y        

    D)         Position Z

    Correct Answer: A

    Solution :

    At position Z the ball has potential energy (energy that an object has due to its position). When it starts rolling down, the potential energy changes into kinetic energy (energy that an object has due to its movement) and at point W, it will have maximum kinetic energy as compared to points Y and X and thus from this position, it will finish rolling with the greatest speed.


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