In the context of vector operations, which two vector quantities were used as examples in the video?

• A. Speed and energy
• B. $\text{Displacement}$ and $\text{velocity}$
• C. Mass and temperature
• D. Pressure and time

Answer: (B)

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. Recall common examples of vector quantities in physics, such as displacement, velocity, acceleration, and force.
3. Identify that displacement and velocity are vector quantities because they include direction as well as magnitude.
4. Recognize that speed, energy, mass, temperature, pressure, and time are scalar quantities because they do not have direction.
5. Conclude that the two vector quantities used as examples in the video are displacement and velocity.