A journey counter records the total distance travelled by a ride-on floor-cleaning machine since the start of a cleaning run.
| Elapsed time in s\text{s}s | Journey-counter reading in m\text{m}m |
|---|---|
| 20 | 36 |
| 28 | 56 |
Using both journey-counter readings, calculate the machine's average speed over this part of the cleaning run.
96 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration, covering 2.2.1 Speed and distance–time graphs, 2.2.2 Acceleration and the uniform-acceleration equation, 2.2.3 Velocity–time graphs, and 2.2.4 Measuring speed, typical speeds and free-fall acceleration. Each one has a worked solution and a mark scheme showing where the marks go.