Answer: centroid.
- A orthocentre
- B centroid
- C incentre
- D circumcentre
Correct answer: B. centroid
Explanation: For a uniform triangular lamina the mass is distributed symmetrically about the medians, so the centre of mass is at the centroid.
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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