Get Help Determining Internal Forces for Part A

[princejan7]

Homework Statement

http://postimg.org/image/i1r51jolz/

The Attempt at a Solution

can someone help me determine the internal forces I need to work out the stresses for part A?
http://postimg.org/image/c2uv3fwmt/


I can't really get any forces from the diagram I drew?

 

[Chestermiller]

You almost have it. From an overall force balance, how is F1 related to P_c? Once you establish this, substitute it into the equations you have already developed. This will give you all the rest of the forces.

Chet