Vector quantities require both magnitude and direction

Steps:

• Recall that vector quantities have magnitude and direction, unlike scalars with only magnitude.
• Examine option A: mass (scalar), distance (scalar), weight (vector)—includes scalars.
• Examine option B: momentum (vector, p = mv), gravitational field strength (vector, g), displacement (vector)—all vectors.
• Examine options C and D: both mix scalars (energy, time, speed) with vectors (force, velocity, acceleration).

Why B is correct:

• Momentum (p = m v, direction from velocity), gravitational field strength (force per unit mass, directional), and displacement (change in position vector) all have direction per vector addition rules.

Why the others are wrong:

• A: Mass and distance are scalars (no direction).
• C: Energy and time are scalars (no direction).
• D: Time and speed are scalars (no direction).

Final answer: B