NEET Sample Paper NEET Sample Test Paper-21

  • question_answer
    The position of a body along \[x-\]axis depends on time as \[\sqrt{x}=t+1.\]Then the speed of the body

    A)  Increases with time

    B)  Decreases with time

    C)  Is independent of time

    D)  None of these

    Correct Answer: A

    Solution :

    \[\sqrt{x}=t+1\] Squaring both sides we get \[x={{t}^{2}}+1+2t\] \[v=\frac{dx}{dt}=2t+2\] As \[t\] increases v also increases. So the speed of the body increases with time or the body is accelerating Hence, the correction option is (a).

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