Question

displacement at the end of 2 minutes 20 s?
1. An athlete completes one round of a circular track of diameter
200 m in 40 s. What will be the distance covered and the​

Answer 1

Answer:

$\red{\textbf{Answer :-}}$

$\textsf{distance :-2200m , displacement =200m}$

Step-by-step explanation:

$\textsf{The diameter of the circular track is given}$

$\textsf{as 200 m. That is, 2r=200 m.}$

$\textsf{From this radius is calculated as Radius,}$

$\textsf{ r = 100 m.}$

$\textsf{In 40 sec the athlete complete one round.}$

$\textsf{So, in 2 mins and 20 secs, that is, 140 sec}$

$\textsf{the athlete will complete = 140 / 40 = 3.5}$

$\textsf{(three and a half) rounds.}$

$\textsf{One round is considered as the}$

$\textsf{circumference of the circular track.}$

$\textsf{The distance covered in 140 sec }$

$\textsf{= 2πr×3.5}$

$\textsf{=2×3.14×100×3.5=2200 m.}$

$\textsf{For each complete round the}$

$\textsf{displacement is zero. Therefore for 3}$

$\textsf{complete rounds, the displacement will be}$

$\textsf{zero.}$

$\textsf{At the end of his motion, the athlete will}$

$\textsf{be in the diametrically opposite position.}$

$\textsf{That is, displacement = diameter = 200 m.}$

$\textsf{Hence, the distance covered is 2200 m}$

$\textsf{and the displacement is 200 m.}$