A shear spring is made from two blocks of rubber, each having a height h , width b , and...

A shear spring is made from two blocks of rubber, each having a height h , width b , and thickness a . The blocks are bonded to three plates as shown. If the plates are rigid and the shear modulus of the rubber is G , determine the displacement of plate A if a vertical load P is applied to this plate. Assume that the displacement is small so that δ = a tan γ ≈ ag.