Velocity is a vector quantity because it is defined using:
ADistance, itself a vector
BTime, itself a vector
CMass, itself a vector
DDisplacement, itself a vector
Answer & Solution
Correct answer: D. Displacement, itself a vector
1. A quantity built from a vector inherits its direction.
2. Average velocity is displacement divided by elapsed time.
3. This definition indicates that velocity is a vector because displacement is a vector.
4. Time and mass are scalars, so neither could supply the direction.
_Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 2 'Kinematics', sections 2.1-2.8_
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