Throwing a curveball causes friction with the air, which causes a curve.
I heard that certain cities have different altitudes, so there is a pressure difference.
The principle of a curveball is that when the ball rotates, the pressure decreases because the air flow speeds up on the side where the direction of the ball goes and the wind flows match
On the other side, the air flow slows down, resulting in greater pressure.
So the ball eventually bends in the direction of rotation.
The problem is that air pressure varies depending on the altitude difference depending on the region, so there are some areas that do not bend well.
For example, in the case of Coors Field, curveball pitchers are at a disadvantage because they do not curve well.
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