Your car’s wheels spin around a stationary axle, and in order for them to do so, something has to allow for “slip” between the two. That something is a wheel bearing. A vehicle’s wheel bolts to a hub, ...

So I was checking out one of my favorite crackpot sites and the contention was made that if you take two steel balls (I think it was 1" steel bearings) and spin one at 27000rpms and launch them both ...