A cable pulls an inspection vehicle through two sections of a horizontal tunnel. In each section, the pulling force is constant and acts in the direction in which the vehicle moves.
| section | start position in km | finish position in km | pulling force in N |
|---|---|---|---|
| 1 | 0.35 | 0.80 | 1200 |
| 2 | 0.80 | 1.55 | 800 |
Calculate the total work done by the cable as the vehicle moves through both sections of the tunnel.