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J & K CET Engineering J and K - CET Engineering Solved Paper-2013

  • question_answer
    The power (P) of an engine lifting a mass of \[100\text{ }kg\]up to a height of \[10\text{ }m\]in \[1\text{ }min\]is

    A)  \[P=163.3\,\,W\]

    B)  \[P=9800\text{ }W\]

    C)  \[P=10000\text{ }W\]

    D)  \[P=5000\,\,W\]

    Correct Answer: A

    Solution :

    \[Power=\frac{Work\text{ }done}{Time}\] Work done \[=mgh=100\times 9.8\times 10\] \[Time=1\text{ }min=60\text{ }s\] \[\therefore \] \[P=\frac{100\times 9.8\times 10}{60}=163.3W\]


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