Answer: N·m.
- A N·m
- B N·m²
- C kg·m²/s
- D J/rad
Correct answer: A. N·m
Explanation: Torque = r x F, so the unit is newton-metre (N·m). Although numerically equal to joules, torque is a vector quantity.
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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