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Manipal Medical Manipal Medical Solved Paper-2013

  • question_answer
    A body falls from rest. In the last second of its fall it covers half of the total distance. If g is \[9.8\text{ }m/{{s}^{2}},\]then the total time of its falls is (in second)

    A)  2                  

    B)  \[2+\sqrt{2}\]

    C)  \[4-\sqrt{2}\]             

    D)  3

    Correct Answer: B

    Solution :

     \[h=\frac{1}{2}g{{t}^{2}}\] \[\frac{h}{2}=\frac{1}{2}g{{(t-1)}^{2}}\] \[t=2\pm \sqrt{2}s\] \[t=2+\sqrt{2}s\]


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