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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<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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