* Displacement: This is the change in position of an object. It's a vector quantity, meaning it has both magnitude (how much the position changed) and direction. Imagine walking 5 meters east – your displacement is 5 meters east.
* Time: This is the duration of the movement.
* Velocity: This is the rate of change of displacement over time. It tells you how quickly the object is changing its position and in what direction.
Here's why this definition is important:
* Direction matters: Velocity considers direction, making it different from speed. Speed only tells you how fast something is moving, but velocity tells you how fast and where it's going.
* Understanding motion: Knowing velocity helps us understand how things move. We can predict where an object will be at a certain time or how long it will take to reach a specific location.
Example:
Imagine a car traveling at 60 kilometers per hour (km/h) east. Here's how velocity applies:
* Displacement: The car's position changes over time, moving eastward.
* Time: We can measure how long the car travels for.
* Velocity: The car's velocity is 60 km/h east. This means that every hour, the car moves 60 kilometers eastward.
In short, velocity is displacement per time because it combines both the rate of change in position (speed) and the direction of that change.
