A \(30-\mathrm{kg}\) block is suspended from a spring with a stiffness of \(300 \mathrm{~N} / \mathrm{m}\) and attached to a dashpot of damping coefficient of \(120 \mathrm{~N} \cdot \mathrm{s} / \mathrm{m}\). The block is subject to a harmonic excitation of amplitude \(1150 \mathrm{~N}\) at a frequency of \(20 \mathrm{~Hz}\). What is the block's steady-state amplitude?