Conservation of Angular Momentum (Non-Collisions) | AP Physics 1 - Unit 6 Lesson 7
In AP Physics 1, conservation of angular momentum doesn’t only apply to collisions. In this lesson, we explore non-collision scenarios where rotational inertia changes, but angular momentum remains conserved because there is no external torque. This is one of the most counterintuitive yet important concepts in Unit 6. What You’ll Learn in This Video: Why is angular momentum conserved without collisions How changing mass distribution changes rotational inertia Why does pulling mass inward increase angular speed The physics behind figure skaters, divers, and spinning people Why there is no linear-momentum analogy for this situation How to correctly define the system to eliminate external torque A full AP-style merry-go-round problem solved step by step How to calculate new angular velocity when a mass moves inward This topic is frequently tested and commonly misunderstood — mastering it can save easy exam points. 👉 Want more practice, FRQs, live Q&A, and exam-focused help? Check out the school community link below for a 7-day free trial. Exclusive videos & corrected lessons Multiple-choice and free-response question practice Live Q&A sessions and problem-solving with tutors 🎓 Join our community here: https://www.skool.com/allen-tsao-stem... Chapters 00:00 Introduction: Angular Momentum Without Collisions 00:25 Review: What Is Angular Momentum? (L = Iω) 04:13 Examples 09:20 Final Message If you want to learn more about the resources we offer, you can check them out at: https://www.bothellstemcoach.com/ap-p... https://www.bothellstemcoach.com/ap-c... https://www.bothellstemcoach.com/ap-p... https://www.bothellstemcoach.com/ap-p... #apphysics1 #learnphysics #physicsconcepts #apphysics #physicshelp #physicsstudents #stemeducation #examprep #physicsclass #angularmomentum #rotationalmotion #physicsexam
