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NEET Physics Motion in a Straight Line / सरल रेखा में गति NEET PYQ-One Dimensional Motion

  • 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 [AIPMT (S) 2011]

    A) 20 m/F

    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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