* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* Speed is a scalar quantity, meaning it only has magnitude.
Examples:
* Object moving in a circle at constant speed: The object's velocity is constantly changing because its direction is changing, even though its speed remains constant.
* Object moving in a straight line and changing direction: Even if the object maintains the same speed, its velocity changes because its direction changes.
In summary: A change in velocity can occur due to a change in speed, a change in direction, or both. A change in speed will always result in a change in velocity, but a change in velocity does not always mean a change in speed.
