I'm not too sure but..
I think I can calculate the moment around point B and then get the value for A. Then I can let Fx=0 and Fy=0 and get the rest of the answers.
Does this make sense?
A 70 kg overhead garage door consists of a uniform rectangular panel AC, 2100 mm high, supported by the cable AE attached at the middle of the upper edge of the door and by two sets of frictionless rollers A and B. Each set consists of 2 rollers located on either side of door. The rollers A are...