Chapter
8
Vectors
SUMMARY POINTs
� Terminologies of vectors :
AB �
: Vector of length AB with initial point A and terminal point B
OP �
: Position vector of P , where O is the origin
AB �
vˆ �
: Magnitude ( length ) of AB � 1 v v
0 : Zero vector
: Unit vector parallel to v , with v ˆ �1
i : Unit vector along the positive x -axis
j : Unit vector along the positive y -axis
k : Unit vector along the positive z -axis
� A vector v can be expressed as v � v1i � v2j � v3k or
�v1
� � � v � v2 �v
� � 3 �
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