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JCECE Engineering JCECE Engineering Solved Paper-2007

  • question_answer
    A particle starts from rest with uniform acceleration and acquires a velocity of \[40\,\,m/s\] in\[10\,\,s\]. The displacement of the particle at the end of \[10\,\,s\] is

    A) \[4\,\,m\]                                           

    B) \[200\,\,m\]

    C) \[20\,\,m\]                        

    D)  none of these

    Correct Answer: B

    Solution :

    If the acceleration is\[f\], then                 \[f=\frac{40-0}{10}m/{{s}^{2}}\]                \[(\because \,\,v=u+ft)\] and displacement in\[10\,\,s\]                 \[=\left( 0\times 10+\frac{1}{2}\times 4\times {{10}^{2}} \right)m\]                                                 \[\left( \because \,\,s=ut+\frac{1}{2}f{{t}^{2}} \right)\]                 \[=200\,\,m\]


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