## Essential University Physics: Volume 1 (3rd Edition)

$k_1=2k_0$
We use the equation for the spring constant of springs in a series configuration to find: $\frac{1}{k_0}=\frac{1}{k_1}+\frac{1}{k_1}$ $\frac{1}{k_0}=\frac{2}{k_1}$ $k_1=2k_0$