Speed
* Definition: Speed is the rate at which an object moves. It tells you how fast the object is traveling.
* Measurement: Speed is measured in units like meters per second (m/s), kilometers per hour (km/h), or miles per hour (mph).
* Scalar: Speed is a scalar quantity because it only has magnitude (size). It doesn't have a direction associated with it.
Velocity
* Definition: Velocity is the rate at which an object changes its position. It tells you how fast the object is moving *and* in what direction.
* Measurement: Velocity is also measured in units like meters per second (m/s), but it includes a direction. For example, 10 m/s north is a velocity.
* Vector: Velocity is a vector quantity because it has both magnitude (size) and direction.
Analogy:
Think of a car driving on a highway.
* Speed: The speedometer tells you the car's speed, say 60 mph.
* Velocity: The car's velocity would be 60 mph east (if the car is traveling east).
Key Takeaway:
* Speed is how fast something is moving.
* Velocity is how fast something is moving *and* in what direction.
This is why speed is a scalar and velocity is a vector.
