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

  • question_answer
    How long will it take to perform \[440\,\,J\] of work at the rate of\[11\,\,W\]?

    A) \[50s\]              

    B)        \[40s\]  

    C) \[30s\]              

    D)        \[20s\]

    Correct Answer: B

    Solution :

     \[11=\frac{440}{t}\Rightarrow t=\frac{440}{11}=40\,\,s\]


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