8 min read
This AP Physics 1 study guide covers the conservation of angular momentum, including the sum of angular momenta in a system and how changes in angular momentum occur due to external torques. It explains how to select systems for analyzing angular momentum conservation, focusing on scenarios with zero and non-zero external torques. It emphasizes the relationship between torque, angular momentum, and moment of inertia, and how changes in mass distribution affect rotational speed. The guide also includes practice multiple-choice and free-response questions and exam tips.
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Question 1 of 12
A figure skater 💃 is spinning and pulls their arms inward. What happens to their angular speed and moment of inertia?
Angular speed increases, moment of inertia increases
Angular speed decreases, moment of inertia decreases
Angular speed increases, moment of inertia decreases
Angular speed decreases, moment of inertia increases