Question: A three - dimensional pin jointed structure is shown in Figure Q 5 . The coordinates, in ( x , y , z , of

A three-dimensional pin jointed structure is shown in Figure Q5. The coordinates, in (x,y,z,
of all four nodes are given in brackets adjacent to the nodes. Three of the nodes are rigid
supports. A 1000 kN force is applied to the 4th node in the negative y direction, i.e.(0 kN ,-
1000kN,0kN). Calculate the forces F1, F1 and F3 in the three truss members.
A three - dimensional pin jointed structure is

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