NEET 2018 Physics question
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass and radius . They all spin with the same angular speed about their own symmetry axes. The amounts of work () required to bring them to rest, would satisfy the relation
Answer: (3)
Solution
By the work-energy theorem, the work required to stop each object equals its rotational kinetic energy: . With the same , . (solid
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