* Constant speed: The object is not speeding up or slowing down.

* Constant direction: The object is not changing its direction of travel.

Here's a breakdown:

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

* Constant velocity implies that both the speed and direction remain unchanged over time.

Examples:

* A car driving at 60 mph on a straight highway has constant velocity.

* A ball rolling across a smooth, horizontal surface with no forces acting on it has constant velocity.

* A satellite orbiting Earth at a constant speed and altitude has constant velocity.

Important Note: An object can have a constant speed but not constant velocity if it changes direction. For example, a car driving in a circle at a constant speed has a changing velocity because its direction is constantly changing.