Answer Happy

Beams A and B have the same lengths and the same maximum
thickness in the y direction (). Beam A has a second moment of area
that is twice that of Beam B. Both beams are cantilevered at one
end and have the same moment applied to their free ends. Consider a
section half way along the length of the beams. Which of the
following is correct?
a) The maximum axial stress at this section is the same for both
beams.
b) The maximum axial stress at this section for Beam A is twice
that in Beam B.
c) The maximum axial stress at this section for Beam A is half
that in Beam B.
d) The maximum axial stress at this section for Beam A is one
quarter of that in Beam B.
e) None of these statements is correct.