Four rigid bodies, 1, 2, 3, and 4, are connected by four springs as shown in the figure. A horizontal force of 1,000 N is applied on body 1 as shown in the figure. Using FE analysis, (a) find the displacements of bodies 1 and 3, (2) find the element force (tensile/compressive) of spring 1, and (3) find the reaction force at the right wall (body 2). Assume the bodies can undergo only translation in the horizontal direction. The spring constants (N/mm) are:
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