Question: A (5 mathrm{~kg}) block is mounted on a helical coil spring such that the system's natural frequency is (50 mathrm{rad} / mathrm{s}). The block is

A $5 \mathrm{~kg}$ block is mounted on a helical coil spring such that the system's natural frequency is $50 \mathrm{rad} / \mathrm{s}$. The block is subject to a harmonic excitation of amplitude $45 \mathrm{~N}$ at a frequency of $50.8 \mathrm{rad} / \mathrm{s}$. What is the maximum displacement of the block from its equilibrium positions?

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