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JCECE Medical JCECE Medical Solved Paper-2006

  • question_answer
    The work done by the centripetal force F when the body completes one rotation around the circle of radius R is:

    A) \[2\pi RF\]         

    B) \[~2RF\]

    C)  RF            

    D)  zero

    Correct Answer: D

    Solution :

     Key Idea: Work done (W) = Force(F) x\[(W)=Force(F)\times displacement(d)\] displacement For a body rotating in circular motion, centripetal force is directed towards the centre of the circle when body completes one rotation, its displacement is zero, hence =Work done = force \[\times \] displacement \[W=F\times 0=0\]


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