An athelete completes one round of a circular track of radius ` R in 40 seconds`. What will be the displacement at the end of ` 2 min. 20 second ?

Explanation

In `2 minutes 20 seconds`, and athelete will
complete =(2 xx 60 + 20 )/(40) =3.5` frounds, i.e. three
complete rotations and one half rotation, i.e.., finally it will be at the oppoiste end of the diamere from the strating point. So displacement` =2 R`.