In the mechanical system in Figure 8.20, the parameter values in consistent physical units are
\[m=1, k_{1}=10, k_{2}=10, b_{1}=5, b_{2}=8\]

The system is subject to initial conditions \(x_{1}(0)=0, x_{2}(0)=0, \dot{x}_{1}(0)=-1\) and unit-step applied forces. Plot the response \(x_{1}\).

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FIGURE 8.20 Problems 24, 25, and 26. k 0000 > x1 k x2 m b