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JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Elastic and Inelastic Collision

  • question_answer
    A body of mass ?M? collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take initial direction of velocity as positive)            [EAMCET 1982]

    A)          Zero                              

    B)          2Mv

    C)          Mv

    D)          ? 2 Mv

    Correct Answer: D

    Solution :

             Change in momentum\[=m{{\vec{v}}_{2}}-m{{\vec{v}}_{1}}\]\[=-mv-mv=-2mv\]


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