Velocity is a/an ___________ quantity.

Velocity is classified as a vector quantity because it encompasses both direction and magnitude. In physics, vector quantities are those that have both size and direction, distinguishing them from scalar quantities, which have size only. For instance, stating that an object is moving at 60 km/h north not only tells us how fast the object is moving (the magnitude) but also the direction it's heading, which is a key characteristic of velocity. This contrasts with other terms like constant, standard, and average, which do not inherently convey direction or the vector nature of velocity. Thus, recognizing velocity as a vector is essential for understanding its behavior in various physical contexts.