* Speed is simply how fast an object is moving. It's a *scalar* quantity, meaning it only has magnitude (a value).
* Velocity is how fast an object is moving *and* in what direction. It's a *vector* quantity, meaning it has both magnitude and direction.
Here's a simple example:
Imagine a car driving around a circular track at a constant speed of 50 mph.
* Speed is constant: The car is always moving at 50 mph.
* Velocity is changing: Even though the speed is constant, the car's direction is constantly changing as it goes around the circle. This means its velocity is constantly changing, even if the speed stays the same.
In summary:
* Speed only cares about how fast something is moving.
* Velocity cares about both how fast and in what direction.
This is why an object can have a constant speed but a changing velocity.
