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NEET Sample Paper NEET Sample Test Paper-27

  • question_answer
    A body rolls down an inclined plane. If its kinetic energy of rotational motion is 40% of kinetic energy of translational motion, then the body is a:

    A)  Ring             

    B)  Cylinder

    C)  Spherical shell    

    D)  Solid sphere

    Correct Answer: D

    Solution :

    For solid sphere. K.E. of rotation \[=\frac{1}{2}I{{\omega }^{2}}\] \[\Rightarrow \]            \[KEr=\frac{1}{2}\left( \frac{2}{5}m{{r}^{2}} \right){{\omega }^{2}}\] \[\Rightarrow \]            \[KEr=\frac{1}{2}m{{\upsilon }^{2}}\] \[\Rightarrow \]            \[KEr=40%\] of  \[\left( \frac{1}{2}m{{\upsilon }^{2}} \right)\]


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