Problem 2. The following figure shows a set of dual tires, each having contact radius 4.52 in. (115 mm) and contact pressure 70 psi (483 kPa). The center-to-center spacing of the dual is 13.5 in. (343 mm). Layer 1 has thickness 6 in. (152 mm) and elastic modulus 100.000 psi (690 MPa); layer 2 has elastic modulus 10.000 psi (69 MPa). Determine the vertical deflection at point A, which is on the interface beneath the center of one loaded area. 4.52 in. 4.52 in. - 13.5 70 psi E₁ = 100,000 psi A E₁ = 10,000 psi