Automobile is a self-propelled passenger vehicle that usually has four wheels and an internal-combustion engine, used for land transport. While,an Aeroplane is a vehicle with wings and one or more engines that enable it to fly through the air. You can say a plane and automobile as a vehicle but,you cannot call a plane an automobile.
Tractive effort is defined as the force at the rims or the outer edges of the driving wheels of moving vehicles.
In other words, it is the sum of the tractive force and rolling effort on the road surface.
The rolling resistance is because of the friction between the tyre and the road surface.
Indicated Power is defined as the power developed by combustion of fuel inside the engine cylinder. It is always more than brake power. Therefore, the difference between IP and BP indicates the power loss in the mechanical components of engine due to friction.
The most commonly used power plant in automobile is I.C. Engine.