Скачать или смотреть How fast is a Fidget Spinner?

Use some mathematics to work out how fast a Fidget Spinner spins. In fidgets/second.

Follow-on video by Steve Mould:    • Exponential decay - why your fidget spinne...  

Maths and science teachers: please do torment your students with this experiment. All they need is a Fidget Spinner and a phone; the two things they refuse to be without.

I used the SpectrumView app, but there are loads of spectrogram apps out there.
http://www.oxfordwaveresearch.com/pro...

The audio the spectrogram recorded is here whynot.
  / fidget-spinner-recording  

This is the plot on the spectrogram screen showing the max frequency.
https://www.dropbox.com/s/33r45m34h3p...

Thanks to Hugh Hunt for his help with this video. He showed me how to measure speed with a spectrogram.
   / spinfun  

CORRECTIONS:
None yet. Let me know if you spot anything!

Support my videos on Patreon:
  / standupmaths  

Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: http://standupmaths.com/
Maths book: http://makeanddo4D.com/
Nerdy maths toys: http://mathsgear.co.uk/