If the velocity of an object is constant, it means that the object is moving at a steady speed in a straight line without any change in direction. In such a case, the acceleration of the object is zero.
Acceleration is defined as the rate of change of velocity over time. If the velocity is constant, there is no change in velocity, and therefore the acceleration is zero. It is important to note that even if the object is moving at a high speed, as long as the speed remains constant, the acceleration will still be zero.