Question: Answer Exercise 6.3.22 when the roller at node 4 only allows it to move in the vertical direction. Exercise 6.3.22 (a) Construct the reduced incidence

Answer Exercise 6.3.22 when the roller at node 4 only allows it to move in the vertical direction.
Exercise 6.3.22
(a) Construct the reduced incidence matrix and the equilibrium equations in this situation. You should have a system of 5 equations in 5 unknowns-the horizontal and vertical displacements of nodes 2 and 3 and the horizontal displacement of node 4.
(b) Is your structure stable? If not, how many rigid motions and how many mechanisms does it permit?

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