MHT CET 2026 Physics question
The radius of gyration of a solid sphere of radius 'R' and mass 'M' about its diameter is and that about a tangent of a solid sphere is . The ratio of to is
Answer: (C)
Solution
Moment of inertia of a solid sphere about its diameter: , so . About a tangent, by the parallel axis theorem: I_t = \dfrac{2}{5}MR^2 + MR^2 = \dfrac{7}{5}MR^2 = MK_t^2, so $ =
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