# Answer to Question #38062 in MatLAB | Mathematica | MathCAD | Maple for Sondos

Question #38062
k=input(' Enter the value of the spring stiffness k: '); c=input(' Enter the value of the damping coefficient c: '); m=input(' Enter the value of the mass: '); t0=input(' Enter the initial time t0: '); tf=input(' Enter the final time tf: '); x0=input(' Enter the initial displacement x0: '); v0=input(' Enter the initial velocity v0: '); x=[x0 v0]; t=[t0 tf]; cr=2*sqrt(k*m); z=c/cr; disp(['the result ' num2str(z)]); if z&lt;1 disp('It is an Under-Damped Response') [t1,x1] = Pro_1(k,c,m,t,x); plot(t1,x1(:,1),t,x1(:,2),'Linewidth',2.5) end The Function is : function [t1,x1]=Pro_1(k,c,m,t,x) [t1,x1] = ode45(rif,t,x); function xdot = rif(t1,x1) xdot= zeros(2,1); xdot(1)=x1(2); xdot(2)=(-k/m)*x1(1)-(c/m)*x1(2); end end Can anyone help me please ???
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