alleryStart learning →A trucker drives along a straight highway for 0.25 h and ends up with a displacement of 16 km south. What is the trucker's average velocity?
A4 km/h south
B4 km/h north
C64 km/h south
D64 km/h north
Answer & Solution
Correct answer: C. 64 km/h south
1. Average velocity is displacement divided by time, keeping the direction of the displacement.
2. v_avg = 16 km / 0.25 h = 64 km/h.
3. The displacement was southward, so the velocity is 64 km/h south, not north.
_Source: OpenStax Physics (CC BY 4.0), Ch 2 "Motion in One Dimension", section 2.2 Speed and Velocity_
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