JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Self Evaluation Test - Work, Energy and Power

  • question_answer
    A body falls freely under gravity. Its velocity is v when it has lost potential energy equal to U. What is the mass of the body?

    A) \[{{\operatorname{U}}^{2}}/{{v}^{2}}\]

    B) \[2{{\operatorname{U}}^{2}}/{{v}^{2}}\]

    C) \[2\operatorname{U}/{{v}^{2}}\]

    D) \[\operatorname{U}/{{v}^{2}}\]

    Correct Answer: C

    Solution :

    [c] \[\operatorname{U}=\left( 1/2 \right)M{{v}^{2}}\]


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