Question

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

Answer 1

Answer:

displacement= 0m  

Explanation:

d of circle= 200m

circumference= 22/7*200= 4400/7m

t for 1 round=20s

total t= 2min 20s= 120+20= 140s

no. or rounds = 140/20= 7 rounds

Since the athlete took 7 whole rounds and each round ended at the point where he began, therefore the diplacement =0m

(displacement is the shortest distance between the starting point and the ending point...............in this case starting and ending point are the same.

Therefore the distance between the starting and ending point= displacement= 0m)