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Vectors (physics)

PostPosted: Mon Sep 03, 2007 11:26 pm
by misterman10
I need help, someone really good in science out there? If so, I will explain what I dont understand more.

PostPosted: Mon Sep 03, 2007 11:30 pm
by OnlyAmbrose
Meh, it's still summer vacation so no guarantee that my brain will work right, but shoot.

PostPosted: Mon Sep 03, 2007 11:34 pm
by misterman10
OnlyAmbrose wrote:Meh, it's still summer vacation so no guarantee that my brain will work right, but shoot.

k, how do you add 3 vectors and find the magnitude, where all of them are at weird angles

PostPosted: Mon Sep 03, 2007 11:39 pm
by misterman10
meh,
Im gonna go try to figure it out now

PostPosted: Mon Sep 03, 2007 11:43 pm
by Neutrino
Wait, wait, wait. Forgive me if I'm misunderstanding you, but you're having trouble with vectors...

Horizontal component is F Cos Angle and Vertical component is F Sin Angle.

Add up the horixontal and vertical components. Don't forget to allow for the CAST rule. Tada! A brand new vector.

Not. Hugely. Complex.

PostPosted: Mon Sep 03, 2007 11:48 pm
by kiamors
what he said basically. I hope you do mean 2d vectors. and make sure you keep all of your angles from the same origin and make sure the answer seems reasonable.

PostPosted: Mon Sep 03, 2007 11:52 pm
by OnlyAmbrose
Nuetrino has the right idea. You're going to have to use trig to figure it out.

PostPosted: Tue Sep 04, 2007 6:02 am
by Titanic
Remember, if there perpendicular to each other, their dot products should equl 0...or something like that.

PostPosted: Tue Sep 04, 2007 6:43 am
by Guiscard
All of this is way over my head :D

Hugely. Complex.

PostPosted: Tue Sep 04, 2007 7:00 am
by Neutrino
Guiscard wrote:All of this is way over my head :D

Hugely. Complex.


Exactly. There is one main thing I'm having trouble with here. It mostly consists of the word 'Vectors' being proceded by the words 'having trouble with'. In my mind these words should never go together, unless accompanied by the word 'not' at some point.

PostPosted: Tue Sep 04, 2007 2:53 pm
by diddle
kiamors wrote:what he said basically. I hope you do mean 2d vectors. and make sure you keep all of your angles from the same origin and make sure the answer seems reasonable.


this is kiamors' only post - nuff said

PostPosted: Tue Sep 04, 2007 3:51 pm
by muy_thaiguy
Normally I would be able to help, but math and science (of ANY type) have always been my downfall. :(

PostPosted: Tue Sep 04, 2007 3:57 pm
by Norse
misterman10 wrote:
OnlyAmbrose wrote:Meh, it's still summer vacation so no guarantee that my brain will work right, but shoot.

k, how do you add 3 vectors and find the magnitude, where all of them are at weird angles


Dude, a vecter is just a magnitude of physical property, with direction taken into account.

In order to find the resultant vecter, just draw a triangle with the length of each triangle side proportional to the vecter's magnitude...

gimme an example and i'll talk you through it