Question

A man ran around a circular track of circumference 2 km in 5 minutes. What are his average speed and average velocity?

• A. Average Speed = 24 m\s; Average Velocity = 0
• B. Average Speed = 24 km\hr; Average Velocity = 24 km\hr
• C. Average Speed = 24 km\hr; Average Velocity = 0
• D. Average Speed = 24 m\s; Average Velocity = 24 m\s

Answer 1

The correct option is C

Average Speed = 24 km\hr; Average Velocity = 0

Since the man ended up where he started after completing a round, displacement = 0.
Distance = 2 km
Time = 5 minutes = $\frac{1}{12}$ hours
$Averagevelocity=\frac{Displacement}{Time}=0$
$Averagespeed=\frac{Distance}{Time}=\frac{2km}{\frac{1}{12}hr}=24\text{kmhr}$