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AMU Medical AMU Solved Paper-1995

  • question_answer
    A body falls from rest under gravity. Its speed is v when it has lost an amount U of its potential energy. The mass of the body is

    A)  \[\frac{Ug}{{{v}^{2}}}\]

    B)  \[\frac{{{v}^{2}}}{2g}\]

    C)  \[\frac{U}{g}\]

    D)  \[\frac{2U}{{{v}^{2}}}\]

    Correct Answer: D

    Solution :

    : Kinetic energy gained = Potential energy lost \[\therefore \]\[\frac{1}{2}m{{v}^{2}}=U\] or \[m=\frac{2U}{{{v}^{2}}}\].


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