(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hello guys, I have a physic class this session and I'm self-teaching myself most of the material. It's going not too bad so far but I have come across a form of solving I have not seen before and would like to understand how it works. I have the data and the answer, I just don't know how to get the answer from the equation. This is the last part of a problem I have to solve that deal with the moment of a force about an edge.

2. Relevant equations

For easier format, here is a picture:

http://unwantedcreations.com/img/physic_1.png [Broken]

First line is λ of the edge

Second line are the coordinate of the point of application of force F

third line are the components x, y and z of the force F.

in case you don't get it at all, here is the problem and solution:

Problem

Solution

3. The attempt at a solution

Ok so I think I get where -25.363 come from, if you take 0.99228 * -1.8 * 14.2 it does make -25.363, but where does -10.5678 comes from? No idea.

Thank you for your time guys.

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# Understanding how to solve this set

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