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

[prof chaos]

[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).

 

[PhanthomJay]

If you set up / solved parts (a), (b) and (c) correctly, part (d) is similar to (c). Have you?