00:01
Okay, so you're talking about unit vectors.
00:04
They give you the vector v is equal to negative 8 i -hat plus 8 j -hat minus 4 k -hat.
00:14
So first, a unit vector is a vector that has a magnitude of 1.
00:20
It helps us kind of make a standard when we're talking about things.
00:27
And it makes us be able to relate it back to our unit circle if we wanted to think about it that way.
00:34
So just like you can take a number and make it equal to one by dividing by that number.
00:44
So for example, if we had like 42, 42 divided by 42 is equal to 1.
00:51
But in a vector you can't just divide by the number.
00:55
You have to divide by the magnitude of the vector, how big it is.
01:00
So that's what these double bars v means.
01:04
So what we have here is that negative 8 is your x component, 8 is your y component, and negative 4 is your z component...