Answer: 2MR²/5.
- A 2MR²/5
- B 2MR²/3
- C MR²/2
- D MR²
Correct answer: A. 2MR²/5
Explanation: For a solid sphere about its diameter, I = 2MR²/5. The hollow sphere gives 2MR²/3.
Torque about axis O equals the force F multiplied by the perpendicular distance r⊥ from the axis to the line of action of the force, producing rotation.
Concept context
Moment of inertia, torque, angular momentum, rolling motion. Very high JEE weightage.
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