* Speed is a measure of how fast an object is moving, regardless of direction. It's the rate of change of distance over time.
* Displacement is the change in position of an object from its starting point to its ending point. It's a vector quantity, meaning it has both magnitude (distance) and direction.
Example: Imagine a runner on a circular track. They run one complete lap, returning to their starting position.
* Speed: They have a non-zero speed throughout the entire lap.
* Displacement: Their displacement is zero because they ended up at the same point where they started.
Another example: A car driving in a circle. It may be traveling at a constant speed, but its displacement will be zero after one full circle.
In summary: An object can have speed while its displacement is zero if it moves in a closed loop or if its motion results in no net change in position.