Using mode superposition method obtain the undamped response of the structure of #1 at t 27/0 (where = VI is the first natural circular frequency) when the following initial displacements are given to the structure: 0.1 m, V2 0.0 m Also write down the expressions for the normal coordinates if damping of factor is present in the structure. (7) H = k= 10,000 N/m k= 15,000 N/m m = 40 kg m = 50 kg Fig. 1 2