Why Do Reaction Forces Differ When Isolating Different Members in Statics?

[AdamMcParland]

Homework Statement

I found this question and thought the situation was quite an interesting one.[/B]

Homework Equations

Seem to only be the 3 general equilibrium form of equations.

The Attempt at a Solution

The problem I encountered with this question was that when I isolated 2 or 3 members out of the system I got an answer for the reaction forces as W/3 but when I isolated only one plank, the equations suggested that the reaction forces were different at each point of contact. Has me mind boggled, all replies would be greatly appreciated, thank you![/B]

 

[BvU]

Hi Adam,
1. Show your work. Perhaps someone sees where something goes awry.
2. Make is side view showing all the forces.