B) For the physical system shown, determine the transfer function X(s)/F(s). K1 K2 B1 B2 M F

2.16 A two-mass translational mechanical system has the following mathematical model: mi + b₁1+k₁(x1 - x₂) = fa(t) m2 2 + b₂2+k₁(x₂-x₁) + k₂x2 = 0 The displacements x, and x₂ are measured from their respective equilibrium positions. An external force fa(t) is applied to the system. Sketch a possible configuration of the two-mass mechanical system. Label all elements and show the positive convention for displacements on your sketch. Sketch the FBDs for each mass and verify the system model by applying Newton's laws.

i just need part 3

The dependence of the tensions t (units: N) in a structure on the external forces f (units: N) follows the linear system Ct=f, where both t and f are 5 by 1 column vectors. The coefficient matrix C has been determined to be [ 11 14 20 -5 -19 ] -5 7 -3 5 -6 4 -5 13 -2 -10 0 0 0 12 -10 0 0 0 0 14 By how many N would the external force f2 need to be decreased (while all other external forces stay the same) in order to decrease the tension t3 by 94 N?