Question

which pair of terms are vectors?
a. mass and weight
b. acceleration and force
c. velocity and speed
d. speed and mass

Explanation:

• A vector quantity has both magnitude and direction.
• Mass is a scalar (only magnitude). Weight (\(W = mg\)) is a vector (has direction - towards the center of the earth).
• Acceleration (\(\vec{a}\)) has direction (e.g., in the direction of the net force). Force (\(\vec{F}=m\vec{a}\)) has direction (e.g., applied force direction).
• Speed is a scalar (only magnitude, e.g., \(v=\frac{d}{t}\)). Velocity (\(\vec{v}\)) is a vector (has direction, e.g., displacement direction over time).

Answer:

B. acceleration and force