This section covers:
Scalars
Some quantities can be described by
a single number;

Vectors
A quantity that requires both size and direction to fully describe it
is called a vector quantity or—more simply—a vector.


is the length of the arrow representing it. Size is notated by enclosing the vector inside double vertical bars: for example, $\text{size of } \overrightarrow{AB} = \\overrightarrow{AB}\\,$ or $\text{size of } \vec v = \\vec v\$ The vectors shown above are all different, because they all have different directions. However, they all have the same size, which is: $\sqrt{2^2 + 5^2} = \sqrt{29}$ 


On this exercise, you will not key in your answer. However, you can check to see if your answer is correct. 
PROBLEM TYPES:
