Speed
* Definition: How fast an object is moving.
* Measurement: Scalar quantity (only magnitude). It's measured in units like miles per hour (mph), kilometers per hour (km/h), or meters per second (m/s).
* Example: A car traveling at 60 mph.
Velocity
* Definition: How fast an object is moving and in what direction.
* Measurement: Vector quantity (magnitude and direction). It's measured in the same units as speed, but with an added direction (e.g., 60 mph north).
* Example: A car traveling at 60 mph north.
Key Differences
* Direction: Velocity includes direction, while speed does not.
* Change: A change in speed *or* direction means a change in velocity. A change in speed alone does not necessarily mean a change in velocity.
Think of it this way:
* Speed: The speedometer in your car tells you your speed.
* Velocity: Imagine you're navigating with a GPS. It tells you your speed *and* the direction you're traveling.
Example:
* Two cars are traveling at 60 mph.
* One car is heading east.
* The other car is heading west.
* They have the *same speed* but different *velocities*.
Let me know if you'd like more examples!
