Which of the following is a vector quantity?

• A. Speed
• B. Force
• C. Time
• D. Mass

Answer: (B)

A vector quantity has both magnitude and direction, while a scalar quantity has only magnitude. Force fits this idea because it describes not only how strong the push or pull is, but also the direction in which it is applied. For example, pushing with a certain amount of force toward the left is different from pushing with the same magnitude toward the right, even if the strength is the same.

The other options are scalars: speed tells you how fast something is moving but not which way; time is a duration with no direction; mass is the amount of matter, also without direction. If you needed a quantity that includes direction, you’d talk about velocity (which is speed with a specified direction) or acceleration (directional change in velocity), but the one that clearly has both magnitude and direction among the choices is force.