# An athlete completes one round of a circular track of diameter 200m in 30 seconds. Calculate the distance covered by the athlete and the magnitude of displacement at the end of 30 seconds.

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by sunanda1

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by sunanda1

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diameter = 200m r= 100m

circumference =2π×100=200π

∴distance covered in 30s = circumference of track=200π=628m

displacement will zer(0) as the final and initial point of athlete is zero , displacement is the shortest distance between initial and final point

diameter of a circular track = 200 m

radius = 100 m

circumference of the circle = distance covered by the athlete = 2πr

= 2 × 22/7 × 100

= 628.4 m

displacement after 30 sec = 0

since, final position and initial position are same.