Referring the question and my own worked out solution in the attachment, I could not get to the answer given that is Ra= 200 N, and Rc = 1300 N. Is there any calculation mistake I made?
https://www.physicsforums.com/attachment.php?attachmentid=65907&stc=1&d=1390369310
I've been stuck on doing my revision on this problem.
The equation of the virtual work, from what I deduce is
[du = 0] -Pdx + mg dh
However the answer given is...