Constant velocity refers to the motion of an object that moves at a steady speed in a straight line. This means that both the speed and direction of the object remain unchanged over time. For example, if a car travels at 60 kilometers per hour on a straight road without speeding up or slowing down, it is said to be moving with constant velocity. In physics, constant velocity is an important concept because it simplifies the analysis of motion. When an object moves with constant velocity, the forces acting on it are balanced, resulting in no acceleration. This principle is often illustrated using graphs, where a straight line on a distance-time graph indicates constant velocity.