A powered inspection carriage moves along a straight horizontal rail. Its mass remains constant.
The forces acting along the rail in two operating conditions are shown in the table.
| Operating condition | Motor force forwards | Resistive force backwards |
|---|---|---|
| 1 | 760 N | 160 N |
| 2 | 1060 N | 160 N |
Calculate the factor by which the acceleration of the carriage changes from operating condition 1 to operating condition 2.