An athlete completes one round of a circular track of diameter 50 m in 30 s. find distance travelled and displacement of the athlete at the end of 30 s.
Answers
Given -
An athlete completes one round of a circular track of diameter 50 metre in 30 seconds
To Find-
The distance and displacement of the athlete at the end of 30 seconds
Distance-
The distance is the longest distance of a movement of a body
Displacement -
The displacement is the shortest distance of a movement of a body
Solution -
Distance = Diametre of circle / time
2πr/ time
2×22/7×50/30 m/s
2200/7/30 m/s
66000/7 m/s
approximately 9429m/s
Displacement = Half of the Diametre of circle/ time
C/2π/ time
9429 /2×22/7 m/s
approximately 1500m/s