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 109 N. Each block has dimensions a = 8 mm and b = 24 mm. Determine the horizontal shear stress in the glue between blocks (1) and (2). The moment of inertia around the horizontal centroidal axis of the beam is 109,568 mm4.