UPSC General Studies Sample Paper General Studies Sample Paper-2

  • question_answer
    A pendulum suspended from the roof of a train has a period T (when the train is at rest). When the train is accelerating with a uniform acceleration 'a', the time period of the pendulum will

    A)  increase                       

    B)  decrease

    C)  remain unaffected

    D)         become infinite

    Correct Answer: B

    Solution :

    [b] The time period of pendulum \[(T)=2\sqrt[\pi ]{c/g}\] here i is pendulum length and g is acceleration of gravity. When train accelerates, new weight relative to train coach will be bigger. So, g will be bigger. This would reduce the period of pendulum.

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