Speed is a scalar quantity, meaning it only describes how fast something is moving. It tells us the magnitude (amount) of motion but not its direction.
Velocity is a vector quantity, meaning it describes both how fast something is moving and in what direction.
Here's an analogy:
Imagine you're driving a car.
* Speed is the number on your speedometer, telling you how fast you're going.
* Velocity is your speed *and* the direction you're traveling in (e.g., 60 mph north).
Here's a table summarizing the key differences:
| Feature | Speed | Velocity |
|---|---|---|
| Definition | How fast something is moving | How fast something is moving and in what direction |
| Type | Scalar | Vector |
| Direction | Doesn't matter | Important |
| Examples | 50 km/h, 10 m/s | 50 km/h east, 10 m/s upwards |
In summary:
* Speed tells you how fast something is moving.
* Velocity tells you how fast something is moving *and* in what direction.
Let me know if you have any other questions!
