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Learning Goal: I’m working on a civil engineering question and need the explanation and answer to help me learn.

In the Truss System shown in the diagram, using the Matrix Displacement Method for the given loads,

a) Find the Displacements at the 4th Node Point (X4, Y4).

b) Find the bar forces (F1, F2, F3).

In all elements, EA = 1000.

L= 6m H= 5m P1= 6 t P2= 4t