The horizontal displacement of a projectile is the distance it travels horizontally during its flight. This is also known as the range of the projectile.

Here's what you need to know about horizontal displacement:

* Constant Velocity: In the absence of air resistance, a projectile travels at a constant horizontal velocity. This means the horizontal speed remains the same throughout its flight.

* No Acceleration: Gravity only acts vertically, so there's no horizontal acceleration.

* Time of Flight: The horizontal displacement depends on the time of flight, which is the total time the projectile spends in the air.

* Formula: The horizontal displacement (range) can be calculated using the following formula:

Range (R) = Horizontal Velocity (Vx) * Time of Flight (t)

Let me know if you'd like to explore how to calculate the time of flight or the horizontal velocity!