Velocity
* Definition: Velocity is the rate of change of an object's position over time. It tells you how fast an object is moving *and* in what direction.
* Units: Velocity is measured in units of distance per unit of time, such as meters per second (m/s) or kilometers per hour (km/h).
* Vector Quantity: Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
Speed
* Definition: Speed is the rate at which an object covers distance. It only tells you how fast an object is moving.
* Units: Speed is also measured in units of distance per unit of time (m/s, km/h, etc.)
* Scalar Quantity: Speed is a scalar quantity, meaning it only has magnitude (no direction).
The Key Difference
The crucial difference between velocity and speed lies in direction.
* Example: Imagine a car driving around a circular track at a constant speed of 60 km/h. The car's speed remains constant, but its velocity is constantly changing because its direction is changing.
In summary:
* Speed: How fast something is moving.
* Velocity: How fast something is moving *and* in what direction it's moving.
Let me know if you'd like more examples or explanations!
