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NEET AIPMT SOLVED PAPER SCREENING 2010

  • question_answer
    An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of \[\text{2}\,\text{m}{{\text{s}}^{\text{-1}}}\]. The mass per unit length of water in the pipe is 100\[\,\text{kg}{{\text{m}}^{\text{-1}}}\]. What is the power of the engine?

    A) 400 W                                   

    B) 200 W   

    C)        100 W                   

    D)        800 W

    Correct Answer: D

    Solution :

    Power \[=\mu \,{{v}^{3}}=\frac{m}{l}\times {{v}^{3}}\] \[=100\times {{(2)}^{3}}=800\,W\]


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