The harmonic oscillator shown has a mass m = 5 kg, a spring with constant k = 4000 N/m, and a dashpot with a damping coefficient c = 20 N·s/m. Calculate the amplitude F0 of the sinusoidal excitation force that is necessary to produce a steady-state vibration with a velocity amplitude of 10 m/s at resonance. What is the corresponding amplitude of the acceleration?
Figure P9.71
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