- The equivalent stiffness \( k \) is the sum of the stiffnesses in parallel.
- From Figure 1a, the stiffnesses are \( 2 \, \text{kN/m} \), \( 3 \, \text{kN/m} \), and \( 1 \, \text{kN/m} \).
\[ k = 2 + 3 + 1 = 6 \, \text{kN/m} = 6000 \, \text{N/m} \]
- The
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