How do you normalize (- 3 i + 12j -5k)?

1 Answer
Mar 5, 2017

u=<-3/sqrt(178),12/sqrt(178),-5/sqrt(178)>

Explanation:

In normalizing the vector we are finding a unit vector (magnitude/length of one) in the same direction as the given vector. This can be accomplished by dividing the given vector by its magnitude.

u=v/(|v|)

Given v=<-3,12,-5>, we can calculate the magnitude of the vector:

|v|=sqrt((v_x)^2+(v_y)^2+(v_z)^2)

|v|=sqrt((-3)^2+(12)^2+(-5)^2)

|v|=sqrt(9+144+25)

|v|=sqrt(178)

We now have:

u=(<-3,12,-5>)/sqrt(178)

=>u=<-3/sqrt(178),12/sqrt(178),-5/sqrt(178)>

Hope that helps!