Which of the following is a vector quantity?

• A. $\mathrm{Mass}$
• B. $\mathrm{Distance}$
• C. $\mathrm{Speed}$
• D. $\mathrm{Displacement}$

Answer: (D)

Verified step by step guidance

1. Understand the difference between scalar and vector quantities. Scalars have only magnitude, while vectors have both magnitude and direction.
2. Analyze each quantity given: Mass is a scalar because it only has magnitude (amount of matter).
3. Distance is a scalar because it measures how much ground an object has covered, without direction.
4. Speed is a scalar because it represents how fast an object is moving, without specifying direction.
5. Displacement is a vector because it describes the change in position of an object and includes both magnitude and direction.