Find a unit vector in the direction of the given vector. w=-7i

Question

zepdrix · Answer

Take your vector w, and divide each component by it's length.$$\Large\rm \hat w=\frac{\vec w}{|w|}=\frac{<0,-7>}{7}=\left<\frac{0}{7},\frac{-7}{7}\right>=\left<0,-1\right>$$

zepdrix · Answer

$\Large\rm \hat w=-i$
Maybe I wrote that a little more complicated that I needed to :)

zepdrix · Answer

The vector goes straight down, so it has a length of 7.
So divide the vector by 7.

Your unit vector is then -i

anonymous · Answer

ahh okay that's what I got, looks like my online homework is telling me the right answer is wrong again :-(. thanks

zepdrix · Answer

Oh wait wait, is i supposed to be the x-component?
like i,j ?
or is it the imaginary unit?

I guess I should have asked that first.

anonymous · Answer

yeah like i and j

zepdrix · Answer

Oh then maybe they wanted the answer in component form?
Like this?
<-1,0>

zepdrix · Answer

Sometimes those online things can be fussy >.<

anonymous · Answer

eh i doubt it, the other identical problems like it are in i and j :( oh well

zepdrix · Answer

mm sucks :c