Angular Momentum Demo: Platform and Dumbbells

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This is a demonstration of the conservation of angular momentum using a platform and dumbbells that are held at varying distances from a spinning body.

This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.

Physics Demos

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Wow! Thanks for showing this demonstration! This has given me a better visual of the concept. I love that you show real life example. Hope you can do more demos that can help more students like me make a better connection.

TrangNguyen-qlox

Wow, what a wonderful demonstration of conservation of angular momentum. Love that Physics 😘😘😘

shivensaini

Amazing video Man!!! Loved the way you explained!!! The example was given in module but I couldn't understand and thought to watch your video and completely understood 😉

krishsinghkshatriya

Whoaaa the way it slows down when arm is out, and speeds up when arm is brought close to chest is awesome.
I wonder what's the physics behind that

Normalsimplicity

applying this to something would be next level awesomness like imagine spinning somethindg and then it tightens up and takes off

SMBRX

I love this demos class
And explanation ❤

bishalbishwakarma

That's why because of p=t*w
When p is constant then when t is lower then w is bigger
Is that right?

hassan

Great demo, but the statement "the moment of inertia is bigger if there's more weight far from the axis., " should refer to more "mass" far from the axis. This shows how slippery the term weight and mass can be when in our experience on the surface of the earth they are never separate.

dougjohnsonpiano