THE PHYSICS OF ROULETTE. Our understanding of the physics behind the movement of the ball and wheel is pretty solid  governed by Newton's laws of motion. As the ball slows, gravity takes hold and it falls into one of the numbered compartments. It is predictable when the ball will leave the rim.

A roulette game is strictly random and any hope of actually getting an edge at the game died when the new (now relatively old) computers took over the wheels.