Vehicle Mass distribution in Simscape Multibody

I am trying to achieve a rather simple vehicle mass distribution with Simscape Multibody.

I have checked the static case of a table soldered to a sloped floor : as expected, all 4 legs of the table have different normal forces.

When I repeat this experiment with a car on a slope using directly the embeded exemple "sm_bumper_car", all 4 wheel normal forces are equal.

Is there something I am missing or does the explanation lie within the Spatial Contact Forces blocks?

Answer 1

[Ben Rancici]

Without any friction betwen the table feet and the floor, the table slide freely and no mass distribution is computed. The solution was to provided external friction forces so the normal forces could be computed by Simscape.