Which pair consists of two vector quantities named in the material?

### Why this is right Displacement and acceleration are both vectors in the material. Each needs a magnitude and a direction to describe it fully. ### The concept Distance and speed are scalars because they describe amount or rate without specifying direction. Displacement differs from distance because it includes directional change from a starting point to an ending point. Acceleration describes a change in velocity and is also directional. ### The other options - **A. Mass and temperature**: both are scalars because neither requires a direction. - **B. Distance and speed**: both are scalars, despite speed being a rate. - **D. Temperature and force**: temperature is scalar, while force is vector, so the pair is mixed. ### Terms - **Displacement**: a change in position with a direction. - **Acceleration**: a vector quantity describing change in velocity. - **Distance**: the length of a path travelled, without direction. - **Speed**: distance travelled per unit time, without direction. ### Remember Velocity and acceleration include direction; speed and distance do not.