Assuming that the inclined plane is smooth and the air resistance is not considered, the reason for the change of the movement state of baseball is that

Assuming that the inclined plane is smooth and the air resistance is not considered, the reason for the change of the movement state of baseball is that

Baseball is affected by gravity, which is divided into two parts: the component f (y) perpendicular to the inclined plane and the component f (x) parallel to the inclined plane. F (y) is balanced with the supporting force of the inclined plane. Therefore, baseball is only affected by F (x) and moves downward along the inclined plane. Baseball moves in a straight line with uniform acceleration along the inclined plane