A 0.9 m square shallow foundation is supported by dense sand. The relative density of compaction, unit weight, and angle of friction (static) of this sand are 75%, 19.2 kN/m3 , and 38%, respectively. Given the depth of the foundation to be 0.9 m, estimate the minimum ultimate bearing capacity of this foundation that might be obtained if the vertical loading velocity on this foundation were varied from static to impact range.