A runner completes a 400-m circular track in 80 seconds, ending at the starting position. What is the runner's average velocity?
A5 m/s
B0 m/s
C400 m/s
D80 m/s
Explanation
📌 Average VELOCITY = displacement / time, and displacement here is zero (started and ended at same point). Even though the runner covered 400 m of DISTANCE, they had zero net displacement. Average SPEED would be 5 m/s (400/80), and that is what A represents — the classic speed-vs-velocity confusion. C and D are arithmetic slips (division vs unit issues).