A train makes a journey in three stages.
Table
| Stage | Distance (km) | Time (hours) |
|---|---|---|
| 1 | 120 | 2 |
| 2 | 0 | 1 |
| 3 | 90 | 1 |
During stage 2 the train is stopped at a station.
What is the average speed of the train for the whole journey?
50 km/h50\ \text{km/h}50 km/h
52.5 km/h52.5\ \text{km/h}52.5 km/h
70 km/h70\ \text{km/h}70 km/h
75 km/h75\ \text{km/h}75 km/h
43 exam-style questions on OCR GCSE Physics 2.1 Motion, covering 2.1.1 Measuring distance and time, 2.1.2 Measuring speed, 2.1.3 Ratios, units and rates in motion, 2.1.4 Scalars and vectors in motion, 2.1.5 Distance-time and velocity-time graphs, 2.1.6 Area under a velocity-time graph, 2.1.7 Average speed for non-uniform motion, and 2.1.8 Uniform motion and uniform acceleration. Each one has a worked solution and a mark scheme showing where the marks go.