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CMC Medical CMC-Medical Ludhiana Solved Paper-2007

  • question_answer
    If x denotes displacement in time t and x = a cos t, then acceleration is

    A)  a cost                                  

    B)  -a cos t

    C)  a sin t                                  

    D)  -a sin t

    Correct Answer: B

    Solution :

                    Given, x = a cos t \[v=\frac{dx}{dt}=\frac{d}{dt}(a\cos t)\]    \[=-a\sin t\] \[\therefore \]  \[\frac{dv}{dt}=\frac{d}{dt}(-a\sin t)=-a\cos t\]


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