This section covers:
Scalars
Some quantities can be described by
a single number;
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Vectors
A quantity that requires both size and direction to fully describe it
is called a vector quantity or—more simply—a vector.
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![]() ![]() ![]() ![]() 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: $\sqrt{2^2 + 5^2} = \sqrt{29}$ |
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On this exercise, you will not key in your answer. However, you can check to see if your answer is correct. |
PROBLEM TYPES:
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