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

  • question_answer
    If the kinetic energy of a body becomes four times of its initial value, then new momentum will [AIIMS 1998; AIIMS 2002; KCET 2000; J & K CET 2004]

    A)                 Becomes twice its initial value

    B)                 Become three times its initial value

    C)                 Become four times its initial value

    D)                 Remains constant

    Correct Answer: A

    Solution :

                        \[P=\sqrt{2mE}\] \\[P\propto \sqrt{E}\] i.e. if kinetic energy becomes four time then new momentum will become twice.


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