Horizontal position refers to the location or displacement from a reference point along a left/right axis. In the given context, the horizontal position of the ball is represented by x(t) = 2t.
Related terms
Velocity: Velocity is a measure of how quickly an object's horizontal position changes over time.
Acceleration: Acceleration represents how quickly an object's velocity (horizontal speed) changes over time.
Trajectory: Trajectory refers to the path followed by an object as it moves through space. In this case, it describes how the ball moves horizontally over time.