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#1 2013-12-01 04:37:32

Al-Allo
Member
Registered: 2012-08-23
Posts: 324

Vector question

Hi, I'm learning vectors and there's two notions which I don't distinguish :

Is the orientation of a vector (determined by the angle it has) the same thing as the direction of a vector ???

thank you

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#2 2013-12-01 05:04:08

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Vector question

Hi;

It is a fine point, my notes read like this,

The direction of a vector is a built in property of that vector, you can define the direction of a vector without any reference to the outside world.

Orientation depends on how it is placed with respect to other vectors (like a basis).

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#3 2013-12-01 05:19:48

Al-Allo
Member
Registered: 2012-08-23
Posts: 324

Re: Vector question

mmmmmhh...... not sure....

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#4 2013-12-01 05:29:54

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Vector question

Part of it can be backed up here on the first page:

http://www.eng.auburn.edu/~marghitu/MEC … 1_2110.pdf

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5 2013-12-01 10:08:53

Nehushtan
Member
Registered: 2013-03-09
Posts: 912
Website

Re: Vector question

Orientation is the angle the vector makes with a fixed axis, e.g. the x-axis. Direction is whether its pointing up or down, or left or right.