Let's we watch how Roberto Carlos do free kick.
Goal......goal......This was one of the best ever free kick. By the way, how Roberto Carlos did it?
- According to Bernoulli Principle, a ball which spins in the same direction of moving air will increase the velocity of the ball. The moving air in the opposite direction of the spin ball is slowed down.
- Higher velocity will produce lower pressure and vice versa.
- Because of this, the air pressure on one side is higher than that the other side. It produces a resultant force acting from high pressure to low pressure.
- Therefore, a spin ball curves.
More examples of spinning ball