Punjab Medical Punjab - MET Solved Paper-2010

  • question_answer
    A rocket of initial mass \[1000kg\] ejects mass at a constant rate of \[10kg/s\] with constant relative speed of\[11m{{s}^{-1}}\]. Neglecting gravity, the acceleration of the rocket 1 min after the blast is

    A) \[11/40m{{s}^{-2}}\]                      

    B) \[22/40m{{s}^{-2}}\]

    C) \[1.1/40m{{s}^{-2}}\]                    

    D) \[1m{{s}^{-2}}\]

    Correct Answer: A

    Solution :

    Acceleration,\[a=\frac{\Delta m}{\Delta t}\cdot \frac{u}{\left( m-\frac{\Delta m}{\Delta t}\cdot 1 \right)}\]                                 \[=10\times \frac{11}{(1000-10\times 60)}\]                                 \[=\frac{11}{40}m/{{s}^{2}}\]


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