고체역학 (Gere) — Shear Forces and Bending Moments: Problem 4.3-11

4.3-11 A beam $ABCD$ with a vertical arm $CE$ is supported as a simple beam at $A$ and $D$ (see figure part a). A cable passes over a small pulley that is attached to the arm at $E$. One end of the cable is attached to the beam at point $B$. (a) What is the force $P$ in the cable if the bending moment in the beam just to the left of point $C$ is equal numerically to $7.5 \text{ kN}\cdot\text{m}$? Note: Disregard the widths of the beam and vertical arm and use centerline dimensions when making calculations. (b) Repeat part (a) if a roller support is added at $C$ and a shear release is inserted just left of $C$ (see figure part b).