# Staics help please

1. Feb 20, 2009

### aeubz

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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2. Feb 20, 2009

### aeubz

Re: staics help please!!!

here is my work

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

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3. Feb 21, 2009

### Kruum

Re: staics help please!!!

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

Last edited: Feb 21, 2009