* Neglecting Air Resistance: In an ideal scenario where we ignore air resistance, the only force acting on the ball is gravity, which acts vertically downward. This means there is no horizontal force to change the horizontal velocity. Therefore, the horizontal component of velocity *would* be constant.
* Real-World Scenario with Air Resistance: In reality, air resistance (drag) plays a significant role. Air resistance is a force that opposes the motion of an object through the air, and it acts in the opposite direction of the object's velocity. This means that as the ball travels upward, air resistance will act in the opposite direction of its horizontal motion, slowing it down.
In summary:
* Ideal scenario (no air resistance): Horizontal velocity is constant.
* Real-world scenario (with air resistance): Horizontal velocity decreases as the ball travels upward.
