Rotating disks with a ball

Hello,

I'm new to unity.

I have a ball and a rotating disk with a static ground around. I want that the ball is affected by the rotational disk when it falls down to it (start rotation, moving on a curve to the border outside and then start moving on the ground with respect to the rotation ... like a inert mass). I have attached a physics material to the disk and the ball.

But nothing happens. Any idea how to do that or a link to a tutorial?

Many thanks for your help.