* Speed is a scalar quantity, meaning it only has magnitude (how fast something is moving).

* Velocity is a vector quantity, meaning it has both magnitude and direction.

Example:

Imagine a car driving around a circular track at a constant speed of 50 mph. Even though the car's speed remains the same, its velocity is constantly changing because its direction of motion is changing.

Key Points:

* Constant Speed: The car is covering the same distance in the same amount of time.

* Variable Velocity: The car's direction is constantly changing, meaning its velocity is constantly changing even if the speed stays the same.

In summary: A body can have constant speed but variable velocity if its direction of motion is changing.