Vectors Flashcards
The arrow joining the start and end point on a graph represents the
Journey made
(3)
(2)
(-2)
(-1)
(3) - how far right on x axis
(2) - how far up on y axis
(-2) - how far left on x axis
(-1) - how far down on y axis
A vector represents shows the point of exactly how the journey was made from
Start to finish ie 2 down 1 right :
(1)
(-2)
How to add vectors
Add the x numbers and y numbers
The symbols for a vector when written are …but in textbooks and exams they are written in …
Underlined
Bold
Always add the arrows on the lines made from the journey representing the direction
Like –>–
When multiplying the number outside multiplies with
Both numbers in the vector
-(3)
(4)
Is the same as:
(-3)
-4
The magnitude of a triangle is
The vector (hypotenuse)
Use pythag theorem from the vector
(3)
(5)
(Sqr) 34 or if can simplify further use surds
Symbol for magnitude of a vector
|c|