Which of the following best describes velocity?

Velocity is defined as a vector quantity because it includes both magnitude and direction. In simple terms, when discussing movement, velocity conveys not just how fast an object is moving but also in which direction it is moving. For instance, saying a car is traveling at 60 kilometers per hour to the north provides a complete understanding of its motion by incorporating both its speed (magnitude) and its direction.

In contrast, a scalar quantity only represents magnitude without direction. For example, speed, which indicates how fast an object is moving but not the direction of that movement, is a scalar. Therefore, velocity cannot be classified as a scalar quantity.

The terms "standard quantity" and "average quantity" do not accurately apply to the concept of velocity. "Standard quantity" is not a recognized category in physics that pertains to velocity, while "average quantity" refers to calculating a mean value over a specific period or range, which could relate to average speed but does not capture the essence of velocity as it pertains to direction.