Speed:
* Scalar quantity: Speed only describes how fast something is moving. It doesn't tell you the direction.
* Examples:
* A car traveling at 60 miles per hour.
* A runner completing a 10-kilometer race in 45 minutes.
Velocity:
* Vector quantity: Velocity describes both the speed *and* the direction of motion.
* Examples:
* A car traveling at 60 miles per hour eastward.
* A plane flying at 500 kilometers per hour northwest.
Key Differences:
* Direction: Speed doesn't care about direction, velocity does.
* Representation: Velocity can be represented as an arrow (the arrow's length indicates speed, and its direction shows the direction of motion). Speed is just a number.
Analogy:
Imagine two cars:
* Car A: Travels at 50 miles per hour. We know its speed.
* Car B: Travels at 50 miles per hour north. We know its velocity.
Both cars are moving at the same rate, but car B has an added piece of information: it's heading north.
In Summary:
Speed is how fast something is moving, while velocity is how fast something is moving *and* in what direction.
