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  4. A body is rolling without slipping on a horizontal surface and its rotational kinetic energy is equal to the translational kinetic energy. The body is

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Q. A body is rolling without slipping on a horizontal surface and its rotational kinetic energy is equal to the translational kinetic energy. The body is

Rajasthan PETRajasthan PET 2004

Solution:

$ {{K}_{rot}}=K $ $ \frac{1}{2}I{{\omega }^{2}}=\frac{1}{2}m{{v}^{2}}=\frac{1}{2}M{{R}^{2}}{{\omega }^{2}} $ $ I=M{{R}^{2}} $
Therefore, body is a ring.