Difference between the average speed and average velocity -
In Exercises 3.13 and 3.14, we have carefully distinguished between average speed and magnitude of average velocity. No such distinction is necessary when we consider instantaneous speed and magnitude of velocity. The instantaneous speed is always equal to the magnitude of instantaneous velocity. Why?
A man ran around a circular track of circumference 2 km in 5 minutes. What are his average speed and average velocity?