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9th Class Science Work and energy Question Bank Work, Energy and Power

  • question_answer
    The power of a pump motor is 2 kilowatt. The water raised by the pump per minute to a height of 10 m is nearly

    A)  500kg                  

    B)         7000kg

    C)  1200kg                  

    D)         zero

    Correct Answer: C

    Solution :

                    \[P=\frac{mgh}{t}\] or,          \[m=P\frac{t}{gh}\]                     \[=\frac{2000\times 60}{10\times 10}\]                     \[=1200\,\,kg\]


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