What is the conservation of angular momentum?

Transcript: http://www.davidcolarusso.com/blog/?p=28#more-28

The Tabletop Explainer is an intermittent educational vlog presenting answers to viewer questions, brief science lessons, and ideas for teachers and students. It is a feature of my blog "Tilts at Windmils" which can be found at http://www.davidcolarusso.com/blog/

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• momentum
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[threelegduck]

how does this work at the atomic level? electrons should also conserve angular momentum, no?

[dcolarusso]

@threelegduck that is correct. For particles like electrons we call this spin. Try Googleing "electron spin" for more information.

[daenumen]

what the hell was that in space??! it looked rediculous

[dcolarusso]

@daenumen it was an artistic rendering of an "accretion disk." If you google "accretion disk," you'll find a pretty good wikipedia article on the subject.

[mattya25]

I love it. Perfect for an opening discussion for this topic in my physics class. How did you create the rotating circle graphics?

[dcolarusso]

Thanks. All of my overlays and animations were done in Flash MX.

[BlastedNation]

Is not magic my friend, its Physics!

[robertwc82]

there is always a logical explanation, its just whether or not people know what it is. in the olden days, magic wasnt a term reserved only for the imaginary.

your example is fictional magic, where as turning rocks dug from the ground into a bright shining sword is real magic (or at least it was considered to be by the ancients)

its like if i discovered teleportation technology, you would all call it magic, but if i explained how the magic works that would some how make it less wonderous?

[kirenemook121]

I am making a race game and I am now working on the physics. Can anyone tell me what the speed and angular velocity is of a object after it had a collision with an other object? And what the new speed and angular velocity is of that other object? Or if you don't know it, do you know someone who does know it?

[raydredX]

@Sublime2O If he was on space or free fall yes. Thanks for giving me ideas. That sounds like a hell lot of fun. XD Now I just need a massive wheel propeller and a space ticket...

[raydredX]

@warvad He wasn't simply holding it. With his own hands he turned the wheel and the wheel pushed him, this push made him spin.

Any clearer? Hope it helps.

[K4inan]

@dcolarusso ''How fast something's going

''How massive that thing is''

''How big a circle it traces'' couldn't the universe itself be part of an angular momentum?

[warvad]

0:25 I find this utterly bizarre. How in the ever-loving FUCK does what he's holding affect whether he spins?

[Sublime2O]

so if he holds the wheel parallel to the ground first and then flips it perpendicular he will either do front flips or back flips depending on the opposite direction the wheel is spinning? lol...

[oioioi3000]

@BlastedNation The ancient people called it Magic and their teachers Magicians or Super-Gods

[RespectMyHate]

So I wonder why, I think, venus has a retro grade orbit around the sun

[picaticatara]

cool quality bro