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
93 exam-style questions on Edexcel GCSE Physics 9.1 Forces and vectors, covering 9.1.1 Interactions and types of force, 9.1.2 Vector and scalar quantities, and 9.1.3 Vector diagrams and free body diagrams. Each one has a worked solution and a mark scheme showing where the marks go.