What is magnus force?
The magnus effect is what makes curve balls curve. It works by making one side of a thrown, spinning object brush past the air faster than the other side. The side of the ball where the spin is in the same direction as the direction of flight has a higher speed, relative to the air, than the other side of the ball, which is spinning backwards to the direction of flight and hence is moving slower relative to the air. The pressure on the baseball is lower on the advancing spin side and higher on the receding spin side, and this creates a difference of air pressure that pushes the ball sideways to the direction of flight toward the advancing spin side.
