model forcaPeso
  extends forca;
  parameter Real m = 10.0;
  parameter Real g = 10.0;
equation
  P = m * g;
  annotation(Diagram(coordinateSystem(extent = {{-148.5, -105}, {148.5, 105}}, preserveAspectRatio = true, initialScale = 0.1, grid = {5, 5})));
end forcaPeso;