B-9-4 (To find the solution use m = 1 kg, m =1/4 kg, k =1 N/m,b=0 N /m, P=1, w=1 rad/s ). Hint: Transform the equations of motion from physical coordinates into modal coordinates to decouple the equations of motion into two single-degree-of freedom damped forced systems to find the solution in modal coordinates. Then transform the modal coordinates solution back into the physical coordinates (See Lecture Notes P7 and P8) Consider the mechanical system shown in Figure 9-41. Obtain the steady-state outputs x(t) and x(t) when the input p(t) is a sinusoidal force given by p(t) = P sin wt k m m p(t) b X1 x2 Figure 9-41 Mechanical system.