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How fast is a Fidget Spinner?

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 Math   |   Toys
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Description

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

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/products/spectrumviewapp/

The audio the spectrogram recorded is here whynot.
https://soundcloud.com/user-719527707/fidget-spinner-recording

This is the plot on the spectrogram screen showing the max frequency.
https://www.dropbox.com/s/33r45m34h3puslw/fidget-spinner-plot.PNG?dl=0

Thanks to Hugh Hunt for his help with this video. He showed me how to measure speed with a spectrogram.
https://www.youtube.com/user/spinfun

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

Support my videos on Patreon:
https://www.patreon.com/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/

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