Simple Analytic Geometry Question - XP Math - Forums

 XP Math - Forums Simple Analytic Geometry Question

 10-28-2007 #1 YvesBenoit Guest   Posts: n/a Simple Analytic Geometry Question Find a vector perpendicular to the plane (1 1 1). Super easy I know, but for some reason I can't find out how to get the vector...
 10-28-2007 #2 Temperal Guest   Posts: n/a This is Analytic Geometry, and therefore I am changing the title Hint: Cross products.
 10-28-2007 #3 YvesBenoit Guest   Posts: n/a n x plane = (0 0 0) ? n x vector = (1 1 1) ? From intuition the vector should be 111 or -1-1-1. I've looked all over the internet and my old textbooks. This is a simple question and I've done this type of stuff over 4 years ago. I'm now in my 3rd year of engineering and finding this vector is a tiny part of answering a much, much bigger question (critical resolved shear stress in an FCC crystalline structure). I worked out the final answer with 111, and it seems wrong. Answer was 0.933MPa when it should lie between 50-100psi.

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