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An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2

minutes 20 s?

Sciences - Main Course Book

Chapter 8. Motion


Circumfrence of track=2*22upon7(pi)*r

round travel in 40 secs=1
round travel in 1s=1upon40

round travel in 140 secs=1upon40*140=7upon2

distance travlled in 7upon2 rounds=7upon2*200

displacement=shortest distance b/w starting and final point=200m
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