3D Moment with force and couple

AI Thread Summary
The discussion revolves around calculating the moment of a milling cutter system subjected to a force of 1040 N and a couple of 211 N·m about point O. The user attempts to apply the equation Mo = R x F + (Couple) but encounters difficulties in achieving the correct components of the moment. While the user confirms that the "302j" component is accurate, the other components, specifically the i and k values, are incorrect. The user seeks assistance in identifying the errors in their calculations. Clarification and guidance on the correct approach to solving the problem are requested.
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Homework Statement


The special-purpoise milling cutter is subjected to the force of 1040 N and a couple of 211 N·m as shown. Determine the moment of this system about point O.
(Let's laugh at the text's typo)

Homework Equations


Mo = R x F + (Couple)

The Attempt at a Solution


I'm having a little difficulty with this... And I'm not sure why... I've done a question with the same question, different numbers and continue to get the right answer.

Anyways...

Mo = (0 - 654.5 * .265)i - (.21 * -808.2)j + (.21 * 654.5)k + <0, 211sin39, -211cos39>

This gave me... <-173i, 302j, -26.5k>

The "302j" is correct, the others are not. Not sure where I went wrong.~~~
Image: http://imgur.com/NB1zpeS
 
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Thread 'Have I solved this structural engineering equation correctly?'

Thread 'Have I solved this structural engineering equation correctly?'

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