I need someones help to teach me how to understand this question.

Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north combine to a total displacement of

16 km north.
11 km west.
6 km south.
2 km south.

Question

I need someones help to teach me how to understand this question. 

 Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north combine to a total displacement of  

16 km north.
11 km west.
6 km south.
2 km south.

anonymous · Answer

Wait would this be 16 km north?

anonymous · Answer

Why is that?

anonymous · Answer

A displacement vector is a distance that you move. North and South are opposite directions. Drawing it on a piece of paper makes it easy to visualise.

anonymous · Answer

Oh I just added them all together :/ Had no idea how to work this out. Do you think you could help me understand 1 more?

anonymous · Answer

Oh I kindof understand it now. That made it easier!