* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* Speed is a scalar quantity, meaning it only has magnitude.
Example: Imagine a car driving in a circle at a constant speed of 50 mph. Even though the car's speed remains constant, its velocity is constantly changing because its direction is changing.
Here's how to think about it:
* Constant Speed: The car is always moving at 50 mph, so its speed is constant.
* Changing Velocity: As the car goes around the circle, its direction is constantly changing. Since velocity includes direction, the velocity is constantly changing even though the speed is constant.
In Summary: You can have a changing velocity with a constant speed if the direction of motion is changing.