3. The composite bar shown is firmly attached to unyielding supports at the ends and is
subjected to the axial load P shown. If the aluminum is stressed to 10,000 psi, find the
stress in the steel.
a. 1000 psi
b. 2000 psi
c. 5000 psi
d. 10,000 psi
e. 20,000 psi