고체역학 (Beer) — Pure Bending: Problem 4.118

4.118 A vertical force P of magnitude 20 kips is applied at point \(C\) located on the axis of symmetry of the cross section of a short column. Knowing that \(y = 5 \text{ in.}\), determine (a) the stress at point \(A\), (b) the stress at point \(B\), (c) the location of the neutral axis.