* Air Resistance: In real-world scenarios, air resistance (drag) acts on a projectile. This force opposes the motion, slowing down the projectile horizontally.
* Ignoring Air Resistance (Ideal Case): If we ignore air resistance, the horizontal velocity of a projectile is constant. This is because there is no horizontal force acting on it. The only force acting on a projectile is gravity, which acts vertically. This means the horizontal component of the projectile's velocity remains unchanged.
In Summary:
* Real World: Horizontal velocity decreases due to air resistance.
* Ideal Case (Ignoring Air Resistance): Horizontal velocity is constant.
