Question

Ryan and his dog Allie walk from their home, around the block, and back home every day, covering a total distance of 400 meters in approximately 12 minutes. Meanwhile, Erica runs in a straight line 600 meters and then back home 600 meters in the same amount of time (12 minutes). A teacher asks her students to make a statement about the motion described above, using vocabulary from the lesson. Three students raise their hands and answer: Audrey: "Ryan and Allie walk with an average speed of about 33.3 meters per minute". Blake: "Ryan, Allie, and Erica all walked with an average velocity of zero because their displacements were each zero". Chay: "Erica's displacement was 1200 meters which means her average velocity was 100 meters per minute".

Answer 1

Step-by-step explanation:

Audrey is correct. Ryan and his dog Allie walk a total distance of 400 meters in 12 minutes, for an average speed of 33.3 m/min.

Blake is also correct. Since all three returned to the point they started, their displacement is zero, so their average velocity is zero.

Chay is incorrect. Erica's distance was 1200 meters, but her displacement was 0 meters.