NEET Sample Paper NEET Sample Test Paper-32

  • question_answer 22) The block of mass m moving on the frictionless horizontal surface collides with a spring of spring constant 'K' and compresses it by length L. The maximum momentum of the block after the .collision is :-

    A)  Zero             

    B)  \[M{{L}^{2}}/R\]

    C)  \[\sqrt{MK}\,\,L\]         

    D)  \[K{{L}^{2}}/2M\]

    Correct Answer: C

    Solution :

    By come \[\frac{1}{2}m{{v}^{2}}=\frac{1}{2}K{{L}^{2}}\] \[\Rightarrow \] \[m{{v}^{2}}=K{{L}^{2}}\Rightarrow (m{{v}^{2}})=mK{{L}^{2}}\Rightarrow mv=\sqrt{mK}\,L\]

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