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NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    If bullet of mass m and velocity v is fired into a large block of mass M. The final velocity of the system

    A) \[\frac{Mv}{M+m}\]                 

    B) \[\frac{mv}{M+m}\]

    C)  \[\frac{m}{M}v\]                      

    D)  \[\frac{M}{m}v\]

    Correct Answer: B

    Solution :

    By conservation of linear momentum \[\operatorname{mv} + 0-=(M + m) v'\]where,            \[\operatorname{v} =initial velocity, m = mass of bullet\] \[\operatorname{v}'= final velocity\] \[\operatorname{M}= mass of block\] \[v'=\frac{mv}{(M\,+\,\,m)}\]


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