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NEET Sample Paper NEET Sample Test Paper-54

  • question_answer
    A bomb of mass 9 kg explodes into the fragments of masses 3 kg and 6 kg. The velocity of mass 3 kg is\[16\text{ }m{{s}^{-}}^{1}\]. The energy of explosion is equal to-

    A) 384 J               

    B) 576 J

    C) 192 J               

    D) 1152 J

    Correct Answer: B

    Solution :

    \[{{m}_{1}}{{v}_{1}}=\,\,{{m}_{2}}{{v}_{2}}\,\,\Rightarrow \,\,3\times 16\,\,=\,\,6\,{{v}_{2}}\] \[{{v}_{2}}=\,\,8\text{ }m/s\] \[E\,\,=\,\,\frac{1}{2}\,{{m}_{1}}{{v}_{1}}^{2}+\frac{1}{2}{{m}_{2}}{{v}_{2}}^{2}\]


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