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JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Conservation of Energy and Momentum

  • question_answer
    The decrease in the potential energy of a ball of mass 20 kg which falls from a height of 50 cm is                [AIIMS 1997]

    A)                 968 J     

    B)                 98 J

    C)                 1980 J

    D)                    None of these

    Correct Answer: B

    Solution :

                        \[\Delta U=mgh=20\times 9.8\times 0.5=98\,J\]


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