Here's why:

* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

* Average velocity is calculated by dividing the total displacement (change in position) by the total time taken.

* Displacement is the straight-line distance between the starting and ending point, considering direction.

Therefore, if the average velocity is zero, the displacement must be zero. This means the object ended up in the same position it started, regardless of how far it traveled or what path it took.

Example:

Imagine a runner running a lap around a track. They start at the starting line, run a full lap, and end up back at the starting line.

* Displacement: 0 (they ended where they started)

* Time: Let's say 60 seconds

* Average Velocity: 0 / 60 = 0 m/s

Even though the runner ran a significant distance, their average velocity is zero because their displacement was zero.