Conservation of angular momentum: rotating stool
A person on a frictionless rotating stool pulls dumbbells in or stretches them out: moment of inertia changes, angular speed changes so that L = Iω stays constant while kinetic energy changes.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 6. Systems of Particles and Rotational Motion |
| NCERT section | 6.12 |
| Level | NCERT level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: angular momentum · moment of inertia · conservation · figure skater
More from this chapter
- Centre of mass of a system and of a rigid body
- Gyroscope precession
- Ladder against a wall: friction and equilibrium
- Moment of inertia of different bodies, parallel/perpendicular axis
- Atwood machine with a massive pulley
- Rolling without slipping: ring, disc and sphere race
- Torque and equilibrium of a rigid body (see-saw)