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Manipal Engineering Manipal Engineering Solved Paper-2012

  • question_answer
    When the bob of a simple pendulum swings, the work done by tension in the string is

    A)  > 0                                        

    B)  < 0

    C)  zero                     

    D)         maximum

    Correct Answer: C

    Solution :

    Tension in the string is along the radius of circular path adopted by the bob; while displacement of the bob is along the circumference of the path. Hence, again\[\mathbf{F}\]and\[\mathbf{s}\]are at\[{{90}^{o}}\]and so\[W=0\].


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