Same chapter3 marksDifficulty: Medium
Why does an ice skater spin faster on drawing the arms inwards?
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Define torque and angular momentum and state the relation between them.
Original Khojo Papers practice question — not from a past board paper.
Answer
Torque is the moment of a force about an axis, the vector product of the position vector and the force. Angular momentum is the moment of momentum, the vector product of the position vector and the linear momentum. Torque is the rate of change of angular momentum, which is the rotational form of Newton's second law.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A zero net torque therefore means constant angular momentum.
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