Torque Equilibirum

Hallo all,

I would like to generate a simulation of an irregular shaped Volume which is, should be resting on one point. I managed to create a ridged body and place it on the floor but.

Than I applied the same force to each vertex of the solid. However this doesn't take into account the difference in volume accrosse the shape and results in the Shape slightly tip to one side.

Has anybody tried this before and maybe has an idea how to add forces to the shap based on its weight and not the surface subdivision?

Thx Richard