The branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy. 

The field of strength of materials deals with forces and deformations that result from their acting on a material.  

An automobile is a self propelled vehicle i.e. a vehicle producing power within itself for its propulsion and requires no external power and ply on the road surface such as car, motorcycle, bus, truck etc.