Question

an athlete completes one round of a circular track of diameter 200m in 40sec. what will be the displacement covered and displacement at the end of 2 min 20 sec?

Answer 1

Answer:

Here is your answer

Explanation:

Displacement is defined as the shortest distance possible between the initial position and the final position. Since the athlete moves in circular motion displacement is zero because initial and final positions are the same. The athlete completes one round in the 40s.

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Answer 2

Answer:

YOUR ANSWER IS .....

DISTANCE = 2200m

Displacement = 200m

Explanation:

Given,

Diameter = 200m

Radius = 200/2 = 100m

Time taken to complete one round = 40s

The athlete completes one round in 40s

Therefore, in 2 mins 20sec i.e 140s, the athlete will complete

= 140/40 rounds

= 3.5 rounds

For each complete round, the displacement is zero.

So in 3.5 rounds, his displacement will be the at the opposite end of the track from where he started.

Therefore, his displacement is equal to the diameter of the track (shortest path to the opposite end) = 200m

Distance Travelled by the athlete = 2πr × 3.5 (no. of rounds)

= 2 × 22/7 × 100 × 3.5

= 2 × 22/2 × 100

= 2200 m

HOPE THAT IT HELPS!