1. The problem statement, all variables and given/known data The support consists of three rigid plates, which are connected together using two symmetrically placed rubber pads. If a vertical force of 5 N is applied to plate A, determine the approximate vertical displacement of this plate due to shear strains in the rubber. Each pad has cross-sectional dimensions of 30 mm and 20 mm. Gr = 0.20 MPa. 2. Relevant equations 3. The attempt at a solution http://www.academia.edu/6204124/Chapter_03 It is problem #3-33. I need help understanding the last part, d =40(0.02083) =0.833 mm Why do they use 40mm, the horizontal length of the padding. Also, where is this equation coming from?