Distance-time graphs
1 mark · EasyWhich of these objects is moving at the greatest average speed during its journey?
| Object | Distance moved (m) | Time taken (s) |
|---|---|---|
| A | 15 | 5 |
| B | 20 | 10 |
| C | 30 | 15 |
| D | 22 | 7 |
Show answer
Correct option: D
Common mistakes: Picking the object with the largest distance only
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correct object (D) selected.
Worked solution
Calculate: A: 15/5 = 3.0 m/s; B: 20/10 = 2.0 m/s; C: 30/15 = 2.0 m/s; D: 22/7 ≈ 3.14 m/s. D is largest.