Final answer:
In physics, when describing a position using two dimensions, a coordinate system (x, y) is used to specify the position in a two-dimensional space. The x-coordinate represents the horizontal position and the y-coordinate represents the vertical position.
Step-by-step explanation:
In two dimensions, a vector describes motion in two perpendicular directions, such as vertical and horizontal. Each vector is made up of vertical and horizontal components. We use a coordinate system, such as (x, y), to specify the position of an object in two dimensions. The x-coordinate represents the horizontal position and the y-coordinate represents the vertical position. These coordinates help pinpoint a location in a two-dimensional space.