12-1,12-2

This week we learned some sections in chapter 12. In 12-1 and 12-2 we learned about vectors and how to represent it.
Vectors-represent motion and it has a magnitude and a direction.

*to add vectors you add head to tail.

the triangle formed by the vectors give the resultant vector.

another thing is to add vector algebraically you add components.

-to find the magnitude

square root of x^2+y^2 magnitude is done as |->|

Ex: A(4,2) B(9,-1) find on top of AB is ->
on top of AB ->(9-4,-1-2)=(5,-3)is on top of AB ->

find the magnitude of on top of AB ->

square root of 5^2+-3^2= square root of 34

Ex: find |on top of AB ->| if A(1,3) B(2,4)
on top of AB -> = 2-1,4-3= (1,1)

|on top of AB ->| Square root of 1^2+1^2= square root of 2.

If you know all your rules and stuff sections 12-1 and 12-2 will be easy for u.