Question

What is the distance traveled between 0 s and 30 s?

Answer 1

Answer:

120 m

Explanation:

The displacement from 0 s to 30 s is 0 m, since the change in position between those points is 0 m.  However, we are asked to find the distance traveled, not the displacement.

The object travels 60 m forward, then 60 m backward.  So the total distance traveled is 120 m.

Answer 2

Answer:

0m

Explanation:

In physics this is 0m, why?

Okay so, you moved 60 meters (in position/m) the first 10 seconds (sec) and then between 10 and 15 seconds, you took a brake and didn't move. (The graph is still because the time is constant and your motion is 0 meters).

When 15 seconds have passed, you go back where you were, exactly at 0 meters, your initial position.

In reality would this be 60 meters + 60 meters back which would be 120 meters, or 0.12km if you will. But in physics world, it's 0 meters in position.

Hope you understood!

Good luck!

Astrophysicist Dr. D