kai was 200 meters north of the library when he remembered he had to return some books to the library. it…

kai was 200 meters north of the library when he remembered he had to return some books to the library. it took him 200 seconds to do the round - trip. which best describes kais roundtrip? his speed was 1 m/s, and his velocity was 0. his speed was 2 m/s, and his velocity was 0. his speed was 1 m/s, and his velocity was 1 m/s north. his speed was 2 m/s, and his velocity was 2 m/s south.

kai was 200 meters north of the library when he remembered he had to return some books to the library. it took him 200 seconds to do the round - trip. which best describes kais roundtrip? his speed was 1 m/s, and his velocity was 0. his speed was 2 m/s, and his velocity was 0. his speed was 1 m/s, and his velocity was 1 m/s north. his speed was 2 m/s, and his velocity was 2 m/s south.

Answer

Explanation:

Step1: Calculate the total distance

The one - way distance is 200 meters, so the round - trip distance $d = 2\times200=400$ meters.

Step2: Calculate the speed

Speed $v_s=\frac{d}{t}$, where $d = 400$ meters and $t = 200$ seconds. So $v_s=\frac{400}{200}=2$ m/s.

Step3: Calculate the displacement and velocity

Displacement is the change in position. Since he returns to the starting point, the displacement $\Delta x=0$. Velocity $v=\frac{\Delta x}{t}$, so $v = 0$.

Answer:

His speed was 2 m/s, and his velocity was 0.