an athlete completes one round of a circular track of diameter 49 m in 20 seconds calculate the distance covered and displacement at the end of 30 seconds
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length AB=49m=2R
time taken to complete one round=20 sec
let the starting point be A
in 140 sec or 2 min 20 sec number of rounds completed=14040=3.514040=3.5
distance traveled=3.5 * (2*ππ*R)=3.5*2*ππ*100 m=2200 m (approx)
displacement refers to change in position from the starting point.the final point is B
as after 3.5 revolutions(starting from A) the athlete will be at B.
displacement=49 m
time taken to complete one round=20 sec
let the starting point be A
in 140 sec or 2 min 20 sec number of rounds completed=14040=3.514040=3.5
distance traveled=3.5 * (2*ππ*R)=3.5*2*ππ*100 m=2200 m (approx)
displacement refers to change in position from the starting point.the final point is B
as after 3.5 revolutions(starting from A) the athlete will be at B.
displacement=49 m
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