NEET Sample Paper NEET Sample Test Paper-19

  • question_answer A particle of mass m strikes a wall at an angle of incidence \[60{}^\circ \] with velocity b elastically. The impulse is

    A) \[mv\]                          

    B) \[m\frac{v}{2}\]

    C) \[-2\,m\,v\]                   

    D)  0 

    Correct Answer: A

    Solution :

    Impulse = change in momentum \[=mv\cos {{60}^{o}}-(-mv\cos {{60}^{o}})\] \[=2mv\,\cos {{60}^{o}}=2mv(1/2)=mv\] Hence, the correction option is [a].

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