Hi, admittedly I have never used MSPhysics for Sketchup, however, I have used other physics engines like FlexHopper for Rhino3D/Grasshopper and Bullet (not to mention full FEA solvers like ANSYS and LS-Dyna). MSPhysics seems pretty cool though as it apparently natively computes contacts between non-convex hulls (many physics engines do not allow non-convex contacts, meaning that you have to go through the tedious process of decomposing-approximating the mesh into convex hulls that can be rigidly connected).
I would be happy to simulate or animate this situation for you.
Thanks,
Caleb