Physics › Section G · Statics, torque, and rotation › Topic G.7
Angular momentum and its conservation
Why does Earth keep turning, and how does a skater spin faster without anyone pushing her? Both answers come from angular momentum, the rotational partner of linear momentum, and from the law that conserves it.
In this topic
- The momentum of spinning things
- Defining angular momentum
- Worked example: a wheel and a ball
- Torque changes angular momentum
- Worked example: braking a flywheel
- Conservation of angular momentum
- Worked example: the spinning skater
- Where the extra energy comes from
- Spin control in sport and nature
- Common mistakes to avoid
- Key takeaways
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