Here's why:
* Velocity: Velocity is a measure of both speed and direction.
* Acceleration: Acceleration is the rate of change of velocity.
If velocity is constant, it means neither the speed nor the direction is changing. Since there's no change in velocity, there's no acceleration.
Example: A car traveling at a steady 60 mph in a straight line has a constant velocity. Because its velocity is not changing, its acceleration is 0.
