Designe of balls in a ball bearing?

square balls are put between conncentric grooved discs. then any of the disc is rotated and square balls become sphere under application of some load.

a small metal ball about half a centimeter high used to make things rotate for example:the pedals on your bike move around with the help of ball bearings

A basketball has little up raised spots ,like a rugby ball, for grip. A foot ball however is plain

below are definitions of each. think about it this way... a ball bearing is just a small, round ,metal ball. It's usually installed into some sort of assembly that's made to go around in circles....

of course meanyhead man guy dufus