* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* Acceleration is the rate of change of velocity. This means that if an object is accelerating, its velocity is changing, either in speed, direction, or both.
Therefore, if a body is accelerating, its velocity cannot be constant.
Example:
Imagine a car driving in a circle at a constant speed. Even though the car's speed is constant, it's constantly changing direction, meaning its velocity is changing. This means the car is undergoing acceleration, even though its speed is constant.
Key takeaway: Constant velocity implies no acceleration, and acceleration implies a changing velocity.
