Question

An athlete runs along a circular track of diameter $28m.$ The displacement of the athlete after he completes one circle is.

• A. $28m$
• B. $88m$
• C. $44m$
• D. Zero

Answer 1

The correct option is D

Zero

(D): Zero

Step 1: Given data

Diameter of circular track d=$28m$

Radius r = $\frac{28}{2}=14m$

Step 2: Calculating displacement

1. Displacement is measured by the shortest distance between the initial and final positions.
2. If the initial and final point is the same as a moving body then the displacement of the object is zero.
3. Here the athlete completes 1 round of the circular track.
4. So total displacement is zero. Because the initial and final point is the same for the athlete.

Thus, the displacement of the athlete after he completes one circle is zero.
Hence, Option (D) is the correct answer.