Final answer:
In 2D motion, the horizontal acceleration is always 0.
Step-by-step explanation:
In 2D motion, the horizontal acceleration is always 0. The horizontal and vertical components of motion are independent of each other. The horizontal motion is not affected by any forces, so there is no acceleration in that direction.
Motion in two dimensions refers to the movement of an object in a plane, typically described by horizontal and vertical axes. Unlike one-dimensional motion, where an object moves along a straight line, motion in two dimensions involves both horizontal and vertical components. The path of the object can be represented graphically as a curve, and its position is defined by two coordinates.