Answer: 0.5 m.
- A 0.3 m
- B 0.4 m
- C 0.5 m
- D 0.6 m
Correct answer: C. 0.5 m
Explanation: x = (m<sub>2</sub>d)/(m<sub>1</sub> + m<sub>2</sub>) = (5 × 0.8)/(3 + 5) = 4/8 = 0.5 m from the 3 kg mass.
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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