Posted by **shiwali** on Friday, July 2, 2010 at 2:19am.

an athlete completes one round of circular track of radius R in 40 second what will be his displacement at end of 2minutes 20 second

- physics -
**Rohan**, Friday, July 2, 2010 at 7:43am
2minutes 20 secinds=3.5 rounds

circumfrence=2pieR

displacement=7x22/7xr

=22r

So the displacement will be 22r

- physics -
**bobpursley**, Friday, July 2, 2010 at 9:35am
Nope, displscement is a vector.

displacement= ending position-starting position.

As I calculate, he is opposite his starting position, or 2R, in the direction opposite the starting point. In polar coordinates, the displacement is

2R@180

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