The Key Concept: Displacement
Average velocity is calculated by dividing the total displacement by the total time. Displacement is the overall change in position, a vector quantity that includes both magnitude (distance) and direction.
Scenario
Imagine an object moving in a circular path. Let's say it moves at a constant speed of 10 meters per second for 10 seconds. Here's what happens:
1. Movement: The object moves in a circle, covering a significant distance.
2. Displacement: Since the object ends up back at its starting point, its total displacement is zero.
3. Average Velocity: Even though the object was moving at a high speed, its average velocity is zero because its displacement is zero.
In simpler terms:
The object might have been moving quickly, but because it ended up exactly where it started, its overall change in position (displacement) is zero. This means its average velocity, which considers both speed and direction, is also zero.
Let me know if you'd like another example!
