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 2minutes 20s

Answer 1

Answer:

The diameter of circular track is given as 200m

i.e. is 2r = 200m

Radius, r = 100m

In 40 second the athlete complete one round.

So, in 2mins and 20 secs.

That is, 140sec the athlete will compete = 140/40= 3.5 rounds

The distance covered in 140sec = 2 pai r × 3.5 = 2200m

Each complete round the displacement is zero.

Therefore for 3 complete rounds, the displacement will be zero.

At the end of his motion, the athlete will be in the diametrically opposite position. i.e.

Displacement = Diameter = 200m

Hence,

The distance covered is 2200m and the displacement is 200m.

Explanation:

Hope this helps you.

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