Definition: Velocity is the rate of change of an object's position over time. It is a vector quantity, meaning it has both magnitude (speed) and direction.
In simpler terms: Velocity tells you how fast an object is moving and in what direction.
Unit:
* Standard unit: meters per second (m/s)
* Other units: kilometers per hour (km/h), miles per hour (mph), feet per second (ft/s), etc.
Example:
* A car traveling at 60 km/h east has a velocity of 60 km/h east.
* A ball thrown upwards with a speed of 10 m/s has a velocity of 10 m/s upwards.
Key points about velocity:
* Constant velocity: An object moving at constant speed in a straight line has constant velocity.
* Changing velocity: An object can change its velocity by changing its speed, its direction, or both.
* Acceleration: The rate of change of velocity is called acceleration.
Difference between velocity and speed:
* Speed is the magnitude of velocity, meaning it only tells you how fast an object is moving.
* Velocity includes both speed and direction.
