Which of the following is a vector quantity?

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

Answer: (A)

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 option: Distance is a scalar because it only measures how much ground is covered, without direction.
3. Speed is also a scalar quantity since it describes how fast an object is moving, without specifying direction.
4. Mass is a scalar quantity representing the amount of matter in an object, with no direction involved.
5. Displacement is a vector quantity because it describes the change in position of an object and includes both magnitude and direction.