Here is my situation.  We have a base vehicle with known corner weights (weight at each tire).  We are constrained after adding other systems to the vehicle on how much each corner can weigh.  We took the base vehicle model which had no mass properties and gave it an assigned mass of 0lbs and in the assembly added  weights at the center of the wheels to account for the base vehicle mass.  We want to be able to have a system within solidworks so that we can see what the new corner weights will be after we add additional hardware.  This way we can put hardware in proposed locations and see if it will brake the max corner weight rule before designs are finalized and manufactured.  With the mass properties information in Solidworks all we get is total mass and COG.  However reversing COG equations will not give us what we want as there are 4 unknowns (corner weights) and 3 equations (xCOG, yCOG, TW=LF+RF+LR+RR).

I have Basic motion capabilities but no motion analysis. I was going to try making simple spring scales and measuring displacement but I can not get basic motion tests with a weight and spring to follow simple Hooke's law.

Any other ideas on how we might achieve this?