alleryIf the total external torque on a system is zero, what is conserved?
AAngular magnitude
BAngular multitude
CAngular magnetism
DAngular momentum
Answer & Solution
Correct answer: D. Angular momentum
1. Zero net torque means nothing changes the rotational state.
2. The rotational quantity then stays fixed.
3. If the total external torque on a system is zero, the total angular momentum is conserved.
4. So the answer is angular momentum.
_Source: syllabus Physics Part I, Ch 6 'Systems of Particles and Rotational Motion'_
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