Physics Forums

Physics Forums (http://www.physicsforums.com/index.php)
-   Calculus & Beyond Homework (http://www.physicsforums.com/forumdisplay.php?f=156)
-   -   Find a unit vector... (http://www.physicsforums.com/showthread.php?t=504652)

MozAngeles Jun6-11 11:55 AM

Find a unit vector...
 
1. The problem statement, all variables and given/known data

Find a unit vector orthogonal to A in the plane B and C if A=2i-j+k B=i+2j+k and C=i+j-2k

2. Relevant equations



3. The attempt at a solution
Im thinking the solution is to take the cross product of B and C. and that would be the solution??

rock.freak667 Jun6-11 12:34 PM

Re: Find a unit vector...
 
Quote:

Quote by MozAngeles (Post 3341959)
3. The attempt at a solution
Im thinking the solution is to take the cross product of B and C. and that would be the solution??

BxC would give satisfy the conditions yes, but you will need to get the unit vector of BxC.

MozAngeles Jun6-11 12:40 PM

Re: Find a unit vector...
 
So my answer would be 1/[tex]\sqrt{35}[/tex](5i+3k-j)?

rock.freak667 Jun6-11 09:18 PM

Re: Find a unit vector...
 
Yes, assuming you calculated BxC correctly.


All times are GMT -5. The time now is 10:46 AM.

Powered by vBulletin Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
© 2014 Physics Forums