David runs exactly 2 laps around a 400m track. What is his distance and displacement?

David runs **2 laps** around a 400m track.

- **Distance**: Distance is the total length traveled. Since each lap is 400 meters, and David runs 2 laps:
  \[
  \text{Distance} = 2 \times 400 = 800 \, \text{meters}
  \]
  So, his **distance** is **800 meters**.

- **Displacement**: Displacement is the shortest straight-line distance between the start and finish points. Since David returns to his starting point after completing the laps, his displacement is:
  \[
  \text{Displacement} = 0 \, \text{meters}
  \]
  because there is no change in position.

Would you like more details or have any further questions?

Here are some related questions:
1. How would the displacement change if David stopped halfway through the second lap?
2. What is the difference between distance and displacement in terms of direction?
3. How do you calculate displacement in a circular motion for a partial lap?
4. How does average velocity differ from speed in this scenario?
5. What would be David's displacement if he ran one full lap and then half of another?

**Tip**: In circular motion, displacement can be tricky—always consider the start and end points to determine it!

Understand how to calculate the distance and displacement when David runs 2 laps around a 400m track. This problem covers key concepts in circular motion, including how to compute the total distance traveled and the displacement, which is the shortest distance between start and end points. Suitable for students in Grades 6-8.

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