if Ajay jogs round the edge of a circular park having radius 630m,how much distance has he covered in one round what will be Ajay's displacement If he takes one round around the circular path.
Answers
Answer:Distance and displacement are two terms that appear to be identical but have quite different meanings and definitions. The term “distance” relates to how much ground an object has covered during its motion, whereas “displacement” refers to how far out of place is an object.
Given parameters
The diameter of the circular track = 200 m
Radius (r) = 200/2
r = 100 m
Time is taken by an athlete to complete one round = 40 seconds.
Displacement = ??
Speed = Distance/Time
Total time athlete moves – 2 min 20 seconds
2 min 20 seconds = 2 × 60 + 20
2 min 20 seconds = 140 seconds
Find the distance covered in one round
Distance covered in one round = Circumference of a circle.
Distance covered in one round = 2πr
Distance covered in one round = 2 × 100 × π
Distance covered in one round = 200π
Time is taken by an athlete to complete one round = 40 seconds.
Number of rounds completed in 140s = 140/40
Number of rounds completed in 140s = 3.5
Distance covered = 3.5 × circumference
Distance covered = 3.5 × 2πr
Distance covered = 3.5 × 2 × 3.14 × 100
Distance covered = 2198 ≈ 2200 m
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