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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Second Law of Motion

  • question_answer
    In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s. The velocity of the gases ejected from the rocket is \[5\times {{10}^{4}}\,m/s\]. The thrust on the rocket is    [MP PMT 1994]

    A)                         \[2\times {{10}^{3}}N\]            

    B)                           \[5\times {{10}^{4}}N\]            

    C)                         \[2\times {{10}^{6}}N\]          

    D)                                       \[2\times {{10}^{9}}N\]

    Correct Answer: C

    Solution :

                              Thrust \[F=u\ \left( \frac{dm}{dt} \right)\]\[=5\times {{10}^{4}}\times 40=2\times {{10}^{6}}\,N\]          


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