Vectors (physics)

misterman10 · Post by **misterman10** » Mon Sep 03, 2007 11:26 pm

I need help, someone really good in science out there? If so, I will explain what I dont understand more.

OnlyAmbrose · Post by **OnlyAmbrose** » Mon Sep 03, 2007 11:30 pm

Meh, it's still summer vacation so no guarantee that my brain will work right, but shoot.

misterman10 · Post by **misterman10** » Mon Sep 03, 2007 11:34 pm

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

misterman10 · Post by **misterman10** » Mon Sep 03, 2007 11:39 pm

meh,
Im gonna go try to figure it out now

Neutrino · Post by **Neutrino** » Mon Sep 03, 2007 11:43 pm

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.

kiamors · Post by **kiamors** » Mon Sep 03, 2007 11:48 pm

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.

OnlyAmbrose · Post by **OnlyAmbrose** » Mon Sep 03, 2007 11:52 pm

Nuetrino has the right idea. You're going to have to use trig to figure it out.

Titanic · Post by **Titanic** » Tue Sep 04, 2007 6:02 am

Remember, if there perpendicular to each other, their dot products should equl 0...or something like that.

Guiscard · Post by **Guiscard** » Tue Sep 04, 2007 6:43 am

All of this is way over my head

Hugely. Complex.

Neutrino · Post by **Neutrino** » Tue Sep 04, 2007 7:00 am

Guiscard wrote:All of this is way over my head

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.

diddle · Post by **diddle** » Tue Sep 04, 2007 2:53 pm

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

muy_thaiguy · Post by **muy_thaiguy** » Tue Sep 04, 2007 3:51 pm

Normally I would be able to help, but math and science (of ANY type) have always been my downfall.

Norse · Post by **Norse** » Tue Sep 04, 2007 3:57 pm

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