1. The problem statement, all variables and given/known data Okay, basically I had a bone in ballistic gels, and I dropped a hexagon (6 sided) weight with the measurements of 1 and 1/2 inches per side from 1 feet, 1 1/2 feet and 2 feet on the ballistic gel enclosed bone. Basically I will need a formula to calculate the psi that he bone experienced. Edit: I calculated the area of the weight to be 13 1/2 square inches, but please double check this. According to http://hyperphysics.phy-astr.gsu.edu/hbase/flobi.html , the N (Newton?) is 1599, can we convert it to PSI? 2. Relevant equations How much PSI did the dropping weight cause on the bone? 3. The attempt at a solution I tried to find a formula to calculate it, but was not really sucessful. Edit: Okay, so the surface area is 13.5 square inches.. i do not know what formular to use to calculate PSI from this point.