Engineers and scientists use mass-spring models to gain insight into the dynamics of structures under the influence of disturbances such as earthquakes. Figure P22.22 shows such a representation for a three-story building. For this case, the analysis is limited to horizontal motion of the structure. Using Newtons second law, force balances can be developed for this system as d2x1 dt2 = k1 m1 x1 + k2 m1 (x2 x1) d2x2 dt2 = k2 m2 (x1 x2) + k3 m2 (x3 x2) d2x3 dt2 = k3 m3 (x2 x3) Simulate the dynamics of this structure from t = 0 to 20 s, given the initial condition that the velocity of the ground floor is dx1/dt = 1 m/s, and all other initial values of displacements and velocities are zero. Present your results as two time-series plots of (a) displacements and (b) velocities. In addition, develop a three-dimensional phase-plane plot of the displacements.

Computer Science 1400 Fall Semester Section 1 : -Fundamentals of computing -Six concepts of a computer scientists -Algorithms -Picobot state direction arrow -Indexing matching ranking -Word Location Trick ranking metawork trick Altavista -Python...