Find the transfer function X,(s)/X;(s) of the mechanical system shown in Figure 4-50. The displacements x, and x, are measured from their respective equilibrium positions. Obtain the displacement xo(t) when the input x (1) is a step displacement of magnitude X, occurring at t 0. Assume that x,(0-) = 0. = Figure 4-50 Mechanical system. k b www CH ww k: Xo