alleryStart learning →How does net torque relate to angular momentum?
AIt equals the rate of change of angular momentum
BIt equals angular momentum times the time taken
CIt equals angular momentum divided by the radius
DIt equals the square of the angular momentum
Answer & Solution
Correct answer: A. It equals the rate of change of angular momentum
1. For straight-line motion, force equals the rate of change of linear momentum, F = delta p / delta t.
2. The rotational analogue is net tau = delta L / delta t.
3. So a net torque is exactly the rate at which angular momentum changes.
4. This is the rotational form of Newton's second law and is very broadly applicable.
_Source: OpenStax College Physics (CC BY 4.0), Ch 10 "Rotational Motion and Angular Momentum", section 10.5 Angular Momentum and Its Conservation_
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