Find the magnitude of a force supported by a bearing

[wannawin]

Homework Statement

Find the magnitude of the force supported by bearing B if the weight of the assemble is supported entirely by A and there is a 120 Nm couple to the shaft. The plate has mass of 15 kg. The cable from C to D prevents the plate from turning.

http://img299.imageshack.us/i/assignment42010.png/

The Attempt at a Solution

I'm not really sure where to start on this one. I know the entire assembly is in equilibrium, but no idea where to go from there.

 

[tiny-tim]

hi wannawin!

"the weight of the assembley is supported entirely by A", so the force at B must be purely horizontal

first find the tension in the cable, then find the force at B