MLB baseball question in the United States

pu1. I heard that throwing a curveball causes friction with the air, which causes a curve, because in certain cities, there is a difference in altitude and there is a pressure difference

2017-12-15

OK

pu2. As the ball rotates, the pressure decreases because the air flow speed increases on the side where the direction of the ball progresses and the wind flow coincide, but the pressure increases on the other side because the air flow slows down. So the ball eventually bends in the direction of rotation, but the problem is that the air pressure varies depending on the altitude difference depending on the region, so there are areas where the curve does not work well. For example, Coors Field has a disadvantage because it doesn't curve well

2017-12-15

OK