A simplified model of a washing machine is shown. A bundle of wet clothes forms a weight ω...

A simplified model of a washing machine is shown. A bundle of wet clothes forms a weight ωb of 20 lb in the machine and causes a rotating unbalance. The rotating weight is 40 lb (including ωb) and the radius of the washer basket e is 9 in. Knowing the washer has an equivalent spring constant k = 70 lb/ft and damping ratio ζ = c/cc = 0.05 and during the spin cycle the drum rotates at 250 rpm, determine the amplitude of the motion and the magnitude of the force transmitted to the sides of the washing machine.

Fig. P19.149