How Do You Solve for Part (D) Using Torque Equations?

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To solve part (D) using torque equations, the torque equation τ = rFsin(θ) is essential, along with trigonometric functions to separate the x and y components. Successful completion of parts (a), (b), and (c) is crucial, as part (D) closely resembles part (c) in its setup. The challenge lies in correctly applying these principles to establish the equations needed for part (D). Ensuring that previous parts are solved accurately will facilitate the process. Proper understanding of torque and its components is key to finding the solution.
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[PLAIN]http://dl.dropbox.com/u/11505247/IMG.jpg

I know that the problem involves using the toque=rFsin(theta) equation, as well as trig to break up the x and y components, but I'm having a real hard time setting up the equations to solve part (D).
 
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If you set up / solved parts (a), (b) and (c) correctly, part (d) is similar to (c). Have you?
 
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