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## Homework Statement

http://img842.imageshack.us/img842/9577/stresstensor.png [Broken]

## Homework Equations

'traction vectors' are just the rows of the stress tensor. that is, the first row of the stress tensor(the i-component of the tensor) is the first traction vector, second row is the second,etc.

traction vector equation is

[tex]

**t**=

_{n}**n**dot

**T**[/tex]

## The Attempt at a Solution

I was trying to find a surface whose normal vector forms the same angle with the three coordinate axes. and then dot this normal vector with the stress tensor in order to determine the traction vector. but the result i get is not any of the three given traction vectors

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