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Manipal Medical Manipal Medical Solved Paper-2008

  • question_answer
    The work done by a particle moving with a velocity of 0.7 c (where c is the velocity of light) in empty space free of electromagnetic field and far away from all matter is:

    A)  positive          

    B)  negative

    C)  zero             

    D)  infinite

    Correct Answer: C

    Solution :

     Acceleration of the particle \[a=\frac{dv}{dt}=\frac{d}{dt}(0.7c)=0\]           (\[\because \]\[c=\]constant) Force on the particle \[F=ma=0\] Thus, work done by a particle will be zero.


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