Question

An athlet running in circular track having radius 14 m with a constant speed of 20 Kmph and he completed one complete revolution. Find the average velocity

Answer 1

speed = distance / time

distance = circumference of circle = 2πr = 2 * 22/7 * 7 = 44m

          = 44/10 m/s

velocity = displacement / time

As the athlete moves in a circular path displacement is zero

            = 0/10 = 0 m/s