An athlete is running on a circular track of radius 1m with a uniform velocity of `20m//s` . Calculate
(i) the difference in the magnitude of the displacement of the athlete and the distance covered by him in completing half a ground .
(ii) magnitude of change in velocity of the athlete in half a round .

Explanation

To solve the problem, we will break it down into two parts as per the question.

### Part (i): Difference in Magnitude of Displacement and Distance Covered

1. **Calculate the distance covered in half a round**:
- The distance covered in a complete round on a circular track is given by the formula for the circumference:
\[
\text{Circumference} = 2\pi r
...