The table shows four forces acting at one point.
| Force | Magnitude | Direction |
|---|---|---|
| P | 18 N | East |
| Q | 10 N | West |
| R | 15 N | North |
| S | 9 N | South |
Use a scale drawing after combining forces in opposite directions. Which additional force would make the resultant zero?
10 N10\ \mathrm{N}10 N, 37∘37^\circ37∘ north of east
14 N14\ \mathrm{N}14 N, 37∘37^\circ37∘ south of west
10 N10\ \mathrm{N}10 N, 37∘37^\circ37∘ south of west
14 N14\ \mathrm{N}14 N, 53∘53^\circ53∘ north of east