**1. What is the difference between a position vector and a displacement vector?**

Position vectors start on the coordinate number plane at the point (0, 0). Displacement vectors can start from any position on the number plane.

**2. What is the zero vector?**

Both of the components of the zero vector are 0!

**3. What is the magnitude of a vector and how is it shown?**

The magnitude of a vector is its length. This is usually calculated using Pythagoras' theorem. The magnitude of vector

ais shown by |a|.

**4. Does a vector have to have an arrow on it?**

Yes, without an arrow on a vector it has no sense or direction and is simply a line segment. The arrow is

essential.