You may have seen a pitcher throw a curveball in baseball.
The pitcher puts a spin on the ball when they release it from their hand. This could be a topspin rotation, where the top of the ball spins forward while the ball hurtles towards the plate. That creates air pressure differences on the ball that cause it to break, or change direction.
When the ball is spinning, its dragging the air with it due to friction between the air and the ball. Its like theres a whirlpool of motion of the air around the ball.
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