Re: is there a point in the center of a rotating disc that is still?

No, for various reasons which I discuss below:

 1) Even if there were one single atom at the very center of the disk that 
single atom would, at a minimum, be spinning in space.

 2) Due to the motion of energy (thermal motion) there will not be any one 
single atom (or molecule) at the exact center of the disk.  A large number of 
atoms will be vibrating in and out of the very center.

 3) The thermal motion itself is motion!!

John Link, MadSci Physicist