Question

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 but the end me 2 minutes 20 s?

Answer 1

In 2 minutes 20 seconds the revolution will be :

2 × 60 + 20 = 140 s

The rounds covered :

140/40 = 3.5 revolutions.

In one revolution the :

Distance covered = 3.142 × 200 = 628.4 m

The total distance is :

628.4 × 3.5 = 2199.4 Meters

The displacement in every complete revolution is 0

In 3.5 revolution is :

0 × 3 + 0.5 × 628.4 = 314.2 Meters

Answer 2

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