At an airport, luggage is transported by a mechanical arrangement. This arrangement consists of a horizontal conveyor belt, a sloping conveyor belt, a lift and a frictionless slide. A suitcase is carried around the airport by this arrangement. The resistive forces that oppose the motion of the suitcase are negligible. For which movement of the suitcase is the net work done on the suitcase greatest?
- Amoving the suitcase a distance of $8\,\text{m}$ at a constant speed up the sloping conveyor belt
- Bmoving the suitcase a distance of $16\,\text{m}$ at a constant speed along the horizontal conveyor belt
- Cmoving the suitcase a distance of $10\,\text{m}$ at a constant speed vertically upwards on the lift
- Dmoving the suitcase a distance of $12\,\text{m}$ at increasing speed downwards on the slide