Question

An athlete completes one round of a circular track of diameter 200m in 40s.
What will be the distance covered and the displacement at the end of 2
minutes20s

Answer 1

distance   :

  if athlete takes 40 s to cover 200m

  then he will cover x distance in 140s

   =(140*200)/40

   =140*5

   =700m

displacement  :

   since it is circular path displacement will be 0 for every 40 sec i.e. for every complete rotation

so for 1st 120s displacement will be zero and the for the rest 20s displacement will be 100m

hope it helps

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