Answer: ML²/12.
- A ML²/12
- B ML²/6
- C ML²/3
- D ML²/4
Correct answer: A. ML²/12
Explanation: I<sub>end</sub> = I<sub>cm</sub> + M(L/2)². So ML²/3 = I<sub>cm</sub> + ML²/4 → I<sub>cm</sub> = ML²/3 - ML²/4 = ML²/12.
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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