A joint between two concrete slabs A and B is filled with a flexible epoxy that bonds securely to the concrete (see figure). The height of the joint is h = 4.0 in., its length is L = 40 in., and its...

A joint between two concrete slabs A and
B is filled with a flexible epoxy that bonds securely
to the concrete (see figure). The height of the joint
is h = 4.0 in., its length is L = 40 in., and its thickness
is t = 0.5 in. Under the action of shear forces
V, the slabs displace vertically through the distance
d = 0.002 in. relative to each other.

(a) What is the average shear strain Υ_aver
in the
epoxy?
(b) What is the magnitude of the forces V if the
shear modulus of elasticity G for the epoxy is
140 ksi?