Solution 13.2
From Mechanics
| Force | Moment (Nm) |
| 8 N at \displaystyle D | \displaystyle -8\times 2=16 |
| 20 N at \displaystyle D | \displaystyle 20\times 0=0 |
| 18 N at \displaystyle C | \displaystyle -18\times 5=-90 |
| 6 N | \displaystyle -6\times 0\textrm{.}5=-3 |
| 5 N | \displaystyle 5\times 1\textrm{.}2=6 |
| 4 N | \displaystyle 4\times 0\textrm{.}5=2 |
| Total Moment | \displaystyle 0-9\textrm{.}6+0-3+6+2=-4\textrm{.}6\text{ Nm} |
