Question

question 3. which of the following units correctly describes the velocity of an object? a. km/s east b. m/s² c. mi/hr d. cm/s² north

Explanation:

Velocity is a vector quantity that has both magnitude and direction. The units of velocity are units of length per unit of time along with a direction. Option A has a length - per - time unit (km/s) and a direction (east). Option B ($m/s^{2}$) is the unit of acceleration. Option C (mi/hr) is a speed unit (it has no direction, speed is a scalar). Option D ($cm/s^{2}$) is also an acceleration unit with a direction, but acceleration is not velocity.

Answer:

A. km/s east