Pi Day 2019: calculating π with a balancing beam

http://wwwh.umble-pi.com
You can buy my book now!

UPDATE: We are out of beam books!

Behind the scenes video is here:
   • Humble Pi by Matt Parker Behind The Scenes  

Get it from Maths Gear and be guaranteed a signed first edition hard back.
https://mathsgear.co.uk/products/humb...

But it is also available on Amazon.
https://www.amazon.co.uk/Humble-Pi-Co...

For teachers (or anyone who would like some extra maths to do!) we have made an activity sheet about infinite series which give pi.
https://www.think-maths.co.uk/pi-sums

Celebrate Pi Day this 14 March (the date is written 3.14 in some countries; good enough for me!).

Check out the fantastic chalkdust magazine: http://chalkdustmagazine.com

CORRECTIONS
I’m not worrying about the bending of the beam bringing the forces slightly closer to the turning point. Just getting in before anyone brings it up.
People are upset I said torque instead of moment. I’m sorry.
People are upset I said “one over a fourth” instead of “one over four”. Technically I was wrong. But am TOTALLY NOT SORRY.
Let me know if you spot anything!

Thanks to my Patreon supports who do support these videos and make them possible. Here is a random subset:

David Wagner
Bruce Patterson
Andrew Jarvis
Loren Thomas
Thijs Raymakers

Support my channel and I can make more maths videos:
  / standupmaths  

The t-shirt I'm wearing is "Woven" by Ugmonk. The discount code STANDUPMATHS should get you 10% off.
https://shop.ugmonk.com/products/woven

Music by Howard Carter
Filming and editing by Penguin
Design by Simon Wright

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