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JCECE Engineering JCECE Engineering Solved Paper-2011

  • question_answer
    A body dropped from the top of a tower covers a distance \[7x\] in the last second of its journey, where \[x\] is the distance; covered in first second. How much time does it take to reach the ground?

    A) \[3\,\,s\]                                             

    B) \[4\,\,s\]

    C)  \[5\,\,s\]                                            

    D)  \[6\,\,s\]

    Correct Answer: B

    Solution :

    Given,\[7x=\frac{g}{2}(2n-1)\]and\[x=\frac{1}{2}g{{(1)}^{2}}\] Solving these two equations\[n=4\,\,s.\]


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