Staics help please

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staics help please!!!

Please help with this problem.. I'm going crazy.

I have attempted the problem and i think my methods are correct. however some algebra mistake is also there i think.

im submitting my work on the thread below

Question: Determine the resultant moment of the two forces about the Oa axis. express the result as a Cartesian vector.

The picture is attached.
Note*: its 80lb that's a bit smudged on the right of the attachment.
 

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Re: staics help please!!!

here is my work

the book answer is : [26.1i - 15.1j] lb*ft
 

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Re: staics help please!!!

Isn't it the perpendicular component of F1 that creates the torque about the Oa axis? Also the [tex]\hat{k}[/tex] in [tex]\vec{m_1}[/tex] seems to be incorrect anyways.
 
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