* Velocity has two components: speed and direction.
* Speed is the rate at which an object moves.
* Direction is the way an object is moving.
While a car going in a circle might have a constant speed, its direction is constantly changing. This means its velocity is changing even if its speed remains the same.
Think of it this way:
* If a car is going 60 mph in a straight line, its speed and direction are both constant.
* If that same car enters a circle, it's still going 60 mph (constant speed), but its direction is constantly changing as it goes around the circle.
Therefore, the car has constant speed, but not constant velocity.