Thanks Hannes

Just a little first animation test. Because it's so short and only a gif, I don't put it to the animation section yet.
[attach=1]
"MiniTutorial":
You just need to measure the radius of the ball. The circumference of the ball is 2 * Pi * radius
That is one rotation (360°) as well
Now just let the ball move the distance you want to and let it rotate in the same direction.