Three toy blocks are glued together to form a beam that supp…

Three toy blocks are glued together to form a beam that supports a vertical shear force of 106 N. Each block has dimensions a = 15 mm and b = 45 mm. Determine the horizontal shear stress in the glue between blocks (2) and (3). The moment of inertia around the horizontal centroidal axis of the beam is 1,354,219 mm4.