Two postal delivery workers have different routes. They both travel from the post office, to neighborhoods to deliver mail, and then back to the post office. Which statement must be true about the two postal delivery workers?

Question

Responses
They have the same velocity.
They travel the same distance.
They each have a displacement of 0 miles.
They each travel a distance of 0 miles.

Answer 1

The statement that must be true about the two postal delivery workers is:

They each have a displacement of 0 miles.

Displacement refers to the change in position from the starting point to the ending point. Since both workers start and end at the post office, their displacement is 0, regardless of the routes they take or the distances they travel. The other statements may not necessarily be true. They can have different velocities and travel different distances, and they do not travel a distance of 0 miles, since they are moving to deliver mail.