I found the transfere functionto be : G(s)=1/(cs-k-ms^2) but I have no idea how to find those unknowns.I have to use MATLAB.

Thank you for your help!

Question:

When a unit step function force P(t) is applied to the system, the displacement x(t) has overshoot of a bit less than 5% (indicating that the real part and imaginary part of poles are the same), reaches its final value of 2, at about 4 seconds. From this unit step response of the system, determine the values of

**m**,

**and**

*k***.**

*c*Figure 1: http://wikis.controltheorypro.com/index.php?title=Forced_Vibration_in_Second_Order_Systems