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J & K CET Engineering J and K - CET Engineering Solved Paper-2007

  • question_answer
    A girl swings on cradle in a sitting position. If she stands what happens to the time period of girl and cradle?

    A)  Time period decreases

    B)  Time period increases

    C)  Remains constant

    D)  First increases and then remains constant

    Correct Answer: A

    Solution :

    As the girl stands up, the effective length of pendulum decreases due to the reason that the centre of gravity rises up. Hence, according to \[T=2\pi \,\sqrt{\frac{l}{g}}\] T will decrease.


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