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BCECE Engineering BCECE Engineering Solved Paper-2006

  • question_answer
    A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to:            

    A) \[{{t}^{1/2}}\]                                   

    B)         \[t\]

    C)         \[{{t}^{3/2}}\]                                  

    D)         \[{{t}^{2}}\]

    Correct Answer: B

    Solution :

    Power delivered to the body \[P=Fv\] \[=mav\] \[=ma(0\,+\,gt)\]             \[(\because \,u=0)\] \[=magt\] or        \[P\propto t\]


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