* Displacement at its maximum: This means the object is furthest from its starting point.

* Velocity equal to zero: This means the object has momentarily stopped moving.

Think of a ball thrown straight up in the air.

* At its highest point: The ball has reached its maximum displacement from the starting point.

* At this very moment: The ball stops for an instant before falling back down. Its velocity is zero.

In summary, displacement is at its maximum and velocity is equal to zero when an object is at its turning point, momentarily changing direction.