Solution 13.2
From Mechanics
| Force | Perpendicular | Moment (Nm) |
| distance (m) | ||
| 8 N at \displaystyle D | 2 | \displaystyle -8\times 2=-16 |
| 20 N at \displaystyle D | 0 | \displaystyle 20\times 0=0 |
| 18 N at \displaystyle C | 5 | \displaystyle -18\times 5=-90 |
| 16 N at \displaystyle C | 2 | \displaystyle 16\times 2=32 |
| 24 N at \displaystyle B | 0 | \displaystyle 24\times 0=0 |
| Total Moment | \displaystyle -16+0-90+32+0=-74\text{ Nm} |
