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

  • question_answer
    Two bodies having same mass 40 kg are moving in opposite directions, one with a velocity of 10\[m/s\] and the other with \[7m/s.\] If they collide and move as one body, the velocity of the combination is                           [Pb. PMT 2000]

    A)          \[10\,m/s\]

    B)                       \[7m/s\]

    C)          \[3\,m/s\]                       

    D)          \[1.5\,m/s\]

    Correct Answer: D

    Solution :

             By the conservation of momentum \[40\times 10+(40)\times (-7)=80\times v\] Þ \[v=1.5\,m/s\]


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