What's the difference between a tractor and a truck?
The tractor (a tractor; a tractor truck; a traction-engine), said simply is between the front and the carriage is a tool used for traction (which is the front of the vehicle can be separated from the original carriage and other traction box, and the box can also be detached from the original front by other locomotives traction) large trucks (general semi trailer). [1]
The simplest explanation: for example, a tractor is a locomotive, a freight car is a locomotive and a truck behind it. That is to say, the tractor is only power, and the lorry is power plus passive gravity
