Quote - > Quote - ...and rotates by the correct amount (rotation = distance_travelled/Radius)?

I don't know the formula to work this out, but I would like to. I think it would involve Pi. I hope it involves apple Pi, because that is my favourite kind, I never was much good at math, but I'm good at eating.  :blink:

 

Lol.  Let's say if the ball rotates 360 degrees, then the distance travelled is the circumference of the ball. 

circumference = 2piRadius

The 2pi is the rotation in radians.  So 2pi radians=360 degrees.

So solving for the rotation, you get 2*pi = circumference / Radius

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