1. ## Unit Vectors!

Hello Helpers!

I'm a tad confused with this question:

Find the unit vector in the same direction as u.

u = -11i - 6j

Anyone know?

Much appreciated,
Margo

2. Originally Posted by margo98
Hello Helpers!

I'm a tad confused with this question:

Find the unit vector in the same direction as u.

u = -11i - 6j

Anyone know?

Much appreciated,
Margo

Hi,

A unit vector has length 1, so you're looking for a vector which is parallel to $\underline{u}$ but has length 1. Best way to get this is to find out the length of $\underline{u}$ and let's call this $a$ then the unit vector you seek is $\frac{1}{a}\underline{u}$.
PS Use pythagoras theorem to find $a$.
Hope that helps.