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NEET Sample Paper NEET Sample Test Paper-71

  • question_answer
    A block of metal weighing 2 kg is resting on a frictionless plane. It is struck by a jet releasing water at a rate of 1 kg/sec and at a speed of 5 m/sec. The initial acceleration of the block will be

    A) \[2.5 m/se{{c}^{2}}\]  

    B) \[5.0 m/se{{c}^{2}}\]

    C) \[10 m/se{{c}^{2}}\]               

    D) None of the above

    Correct Answer: A

    Solution :

    Force on the block \[\operatorname{F}= u\left( \frac{dm}{dt} \right) 5 \times  1 = 5 N\] \[\therefore \] Acceleration of block \[a=\frac{F}{m}=\frac{5}{2}\,\,=\,\,2.5\,\,m/{{s}^{2}}\]


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