2. Solved Papers
  3. J & K CET Medical

J & K CET Medical J & K - CET Medical Solved Paper-2014

  • question_answer
    A crane lifts weight of 75 kg to a height of 15 m in 15 s. The power of the crane is (assuming\[g=9.8\text{ }m/{{s}^{2}}\])

    A)  635 W           

    B)  735 W

    C)  835W            

    D)  1135W

    Correct Answer: B

    Solution :

     Work done by lift = change in PE of weight \[=mgh\] \[=750\times 9.8\times 15=11025\text{ }J\] So power of crane \[=\frac{Energy\text{ }used}{time}\] \[=\frac{11025}{15}=735\,W\]


You need to login to perform this action.
You will be redirected in 3 sec spinner