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SSC Sample Paper SSC-CGL TIER - I Sample Test Paper-10

  • question_answer
    A body is falling freely under the action of gravity alone in vacuum. Which one of the following remains constant during the fall?

    A) Potential Energy

    B) Kinetic Energy

    C) Total linear momentum

    D) Total mechanical energy

    Correct Answer: D

    Solution :

    For a freely falling body in the vacuum the total mechanical energy of the body will remain constant. The sum of potential and kinetic energies of a freely falling body at all points will be same. Under the force of gravity, the mechanical energy of the body remains constant. This phenomenon is governed by 'Law of conservation of energy' that energy can neither be created nor be destroyed.


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