model mola "Componente mola linear"
  parameter Real k = 10000.0;
  junta a, b;
equation
  k * (b.y - a.y) = -a.f;
  a.f + b.f = 0.0;
  annotation(Diagram(coordinateSystem(extent = {{-148.5, -105}, {148.5, 105}}, preserveAspectRatio = true, initialScale = 0.1, grid = {5, 5})));
end mola;