Answer: L = Iω.
- A L = Iω
- B L = mv²
- C L = τ × t
- D L = F × r
Correct answer: A. L = Iω
Explanation: L = Iω (angular momentum = moment of inertia x angular velocity). It is conserved when net torque is zero.
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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