Wobbly Circles
Matt Parker on circles and centres of mass.
The man who loved circles: https://youtu.be/AzmUCL1OHhs
Matt's signed book (& extra goodies): http://bit.ly/Matt_Signed
Amazon (US): http://bit.ly/Matt_4D_US
Amazon (UK): http://bit.ly/Matt_4D_UK
Discuss this video on Reddit: http://redd.it/2ftbcl
* Although correct, Matt does not use the most elegant method here, introducing more negatives than he would have liked. He apologises.
Correction: 45 degrees is equal to pi/4 radians