Find Unit Vector Parallel to Vector: (5,1,-3) to (2,1,1)

[mamma_mia66]

Homework Statement

Find a unit vector that is parallel to the vector from )5,1,-3) to (2,1,1)

Homework Equations

The Attempt at a Solution

I will appreciate any HINT for this problem b/c I am totaly confused from the why how the question is stated. Please help.

 

[NoMoreExams]

First find a vector that goes between those 2 points

 

[Preno]

Well, you know what the direction of the vector is, you just have to scale it correctly...

 

[mamma_mia66]

Well, you know what the direction of the vector is, you just have to scale it correctly...

I don't think I get this that I have to scale it correctly...

 

[NoMoreExams]

Well, you know what the direction of the vector is, you just have to scale it correctly...

I don't think I get this that I have to scale it correctly...

What's the difference between any old vector and unit vector?

 

[mamma_mia66]

okay, I am following the textbook and nothings helps.

The points (5,1,-3) and (2,1,1) are the points of the vector V=<-3,0,4>

Then ||v||= 5
u= v/||v||= 1/5<-3,0,4>
Two nonzero vectors u avd v are parallel if there is some scalar c
such that
u=c.v

Am I even close with this solution? I am getting more confused.

 

[Mark44]

That's the vector you want.

 

[mamma_mia66]

Thank you.