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NEET AIPMT SOLVED PAPER SCREENING 2011

  • question_answer
    A boy standing at the top of a tower of 20 m height drops a stone. Assuming \[g=10\,m{{s}^{-2}}\], the velocity with which it hits the ground is

    A)  20 m/s

    B)                                         40 m/s

    C)         5 m/s                   

    D)         10 m/s

    Correct Answer: A

    Solution :

    Given, \[g=10\,m{{s}^{-2}}\] and h = 20 m We have \[v=\sqrt{2gh}\] \[v=\sqrt{2\times 10\times 20}=\sqrt{400}=20\,m{{s}^{-1}}\]


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