Unbelievable Spinning Disk


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Picture of Matteo30 achievements

+8 1. Matteo commented 11 years ago

zero friction :D
Picture of banzemanga46 achievements

+10 2. banzemanga commented 11 years ago

Someone got to explain that to me. :S

At first i thought the disk's spinning increased because the disk and the magnets were magnets with the same polarity. But at the end, it showed that the disk stop spinning touching the surface meaning that they are not magnets of the same polarity. Therefore, my hypothesis is incorrect.
Picture of thejackel36 achievements

+5 3. thejackel commented 11 years ago

maybe she just spent it really hard :D
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-13 4. Jahoo commented 11 years ago

Rotating magnet in the plate, same concept that you use in chemistry when you need to keep a mixture in motion.
Picture of BreakIsBetter16 achievements

+59 5. BreakIsBetter commented 11 years ago

There's no magnetism at work here. It's just a finely machined metal disc on a slightly concave mirror. Nothing but gravity and the momentum imparted initially to the disc. There are no (or very little) imperfections between the edge of the disc and the surface that would normally act as an energy sink, so you get a nice, long spin with an amazing increase in frequency towards the end.
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+20 6. mmmendal commented 11 years ago

I would have liked to see some markings on the disk to see its circular motion around its center.
P.S. #5 is correct
Picture of shayangx43 achievements

+45 7. shayangx commented 11 years ago

Im glad I dont have one, Id waste a full day just spinnig that thing over and over again :p
Picture of modder8her40 achievements

+6 8. modder8her commented 11 years ago

Great new token for inception?
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+7 9. joka232 commented 11 years ago

Awesome, i thought it was going to go back in time or something!!
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+5 10. mi7o commented 11 years ago

the end is epic :)
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+5 11. orion commented 11 years ago

As #5 said, no magnetism. Every coin does this, only it stops sooner. The rotation is not speeding up. At the end, the actual rotation speed is almost zero. Only the wobble frequency is increasing because when the angle decreases, the axis of rotation and the axis of wobble (precession) are almost parallel and fast opposite rotations about these two axes cancel out into slow actual rotation of the disk.
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+6 12. wingchunguy commented 11 years ago

love the ending, like im traveling in space!
Picture of schlafanzyk35 achievements

+1 13. schlafanzyk commented 11 years ago

It's the same thing that happens when you spin a coin on a glass/mirror surface, just slower due to the larger mass and size of the disk.
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0 14. Zethriel commented 11 years ago

Through some in a library, would give everyone a nice sizable panic attack
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0 15. cranky commented 11 years ago

I love how at the end it stops so cleanly and definitely. The end also reminds me of the film Cube (1997) for some reason.
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0 16. snotraddict commented 11 years ago

Would like to see in slo mo
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0 17. denniscav commented 11 years ago

Unless the surface upon which the disk is spinning is concave, due to the disk's gravitation to the center, magnets are certainly involved.
Picture of peacinu34 achievements

0 18. peacinu commented 11 years ago

#5 Very interesting, but what's the use of this? It can help you/us with.....? What?