A large seismic instrument is constructed so that m = 45 kg and c/cc = 0.707. A spring with k = 2.9 kN/m is used so that the instrument will be relatively insensitive to low-frequency signals for displacement measurements and relatively insensitive to high-frequency signals for acceleration measurements. Calculate the value of linear acceleration that will produce a relative displacement of 2.5 mm on the instrument. Calculate the value of ω1/ωn such that
