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NTSE Sample Paper NTSE SAT Practice Test-19

  • question_answer
    A man fires a bullet of mass 200g at a speed of 5\[m{{s}^{-1}}\]. The gun has a mass of 1 kg. By what velocity will the gun rebound backwards?

    A) 0.1 \[m{{s}^{-1}}\]                 

    B) 0.01\[m{{s}^{-1}}\]

    C) 1 \[m{{s}^{-1}}\]        

    D) 10\[m{{s}^{-1}}\]

    Correct Answer: C

    Solution :

    [c] Applying the principle of conservation of linear momentum, we have \[\left( \frac{200}{1000} \right)\times 5=1\times V\,\,or\,\,V=1\,\,m{{s}^{-1}}\]    


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