An engineer investigates the speed of a vibration pulse along a long metal beam. Two electronic pickups, A and B, are fixed 7.50 m apart. The same data logger records the time at which each pulse reaches the pickups.
| Test | Time at pickup A in ms\mathrm{ms}ms | Time at pickup B in ms\mathrm{ms}ms |
|---|---|---|
| 1 | 2.16 | 3.64 |
| 2 | 5.32 | 6.83 |
| 3 | 8.47 | 9.98 |
Calculate the mean speed of the pulse between pickup A and pickup B. Give your answer in m/s\mathrm{m/s}m/s.