USING SEVEN WEDGE BLOCKS, A SERIES OF SIX EQUILIBRIUM MODELS EXPLORES HOW GEOMETRY, GRAVITY AND TENSION PRODUCE STABILITY. EACH MODEL ARRANGES WEDGES SO GRAVITY, CONTACT NORMALS, AND FRICTIONAL FORCES ALIGN TO CANCEL NET FORCE, CREATING EQUILIBRIUM. THE FIRST THREE MODELS RELY SOLELY ON PRECISE CONTACT GEOMETRY, MASS DISTRIBUTION, AND FRICTION TO ACHIEVE BALANCE (NO POST-TENSION). THE LATTER THREE INTRODUCE DISCRETE POST-TENSIONING CABLES USING THIN METAL ROD THAT ADD COMPRESSIVE PRE-STRESS ACROSS CONTACT FACES, INCREASING ALLOWABLE ECCENTRICITY AND ENABLING MORE AGGRESSIVE CANTILEVERS. COMPARING BOTH SETS HIGHLIGHTS HOW POST-TENSION CONVERTS MARGINAL, GEOMETRY-DRIVEN BALANCE INTO ROBUST, TUNABLE EQUILIBRIUM UNDER LARGER DESTABILIZING LOADS.