Figure 1.75 shows a system in which the mass (m) is directly connected to the springs with

Question:

Figure 1.75 shows a system in which the mass $m$ is directly connected to the springs with stiffnesses $k_{1}$ and $k_{2}$ while the spring with stiffness $k_{3}$ or $k_{4}$ comes into contact with the mass based on the value of the displacement of the mass. Determine the variation of the spring force exerted on the mass as the displacement of the mass $(x)$ varies.

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