What yo-yo is made of
A disc on a string.
- Two yo-yo halves — has part. Flywheel discs.
- Axle — has part. The axis between the discs.
- Rope — has part. A thread.
- Angular momentum — uses. Rotation.
- Conservation of energy — uses. Potential → kinetic energy.
- Clay — is made of. Greek yo-yos were terracotta.