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## Homework Statement

Problem 3.60:

## Homework Equations

[itex]M_{AD}= \begin{vmatrix}

\lambda_x & \lambda_y & \lambda_z \\

x_{B/A} & y_{B/A} & z_{B/A} \\

F_x & F_y & F_z &

\end{vmatrix}

[/itex]

## The Attempt at a Solution

Looking at the figure, these are the unit vector components for line AD:

[itex]\lambda_x=1 \ m

\\ \lambda_y= 0 \ m

\\ \lambda_z = -0.75 \ m

[/itex]

And these are the coordinates for point B where the force is applied:

[itex]x_{B/A}=0.5 \ m

\\ y_{B/A}= 0 \ m

\\ z_{B/A} = 0 \ m

[/itex]

The force vector for the tension in BG:

[itex]\mathbf{T_{BG}}= 450*(\frac{-0.5\hat{i}+0.925\hat{j}-0.4\hat{k}}{1.125})= -200\hat{i}+370\hat{j}-160\hat{k} \ N[/itex]

Plugging these values into the matrix above, I get -138.75 N*m, but the answer is supposed to be -111.0 N*m

**Edit: Changed the mistake I made in the second row. Still getting the wrong answer.**

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