Hi, so a friend and I had a question a few days ago and we don't know what will happen. So, let's say that there's an infinitely rigid ball that's very large (so it doesn't deform and so that the tangential velocity at different radii are noticeably different). Now, let's say this ball were rotating such that a point on the surface of the sphere were moving at 0.9999. What kind of forces would be on the ball? Would it just be shearing forces to different "slices" of the ball? How would a point on the surface with a greater radii and a point on the surface with lesser radii see each other? Thanks in advance!