What scientific principles were applied to develop the car?

What scientific principles were applied to develop the car?
Cars are developed with what is called a systems approach. Because of the shear complexity of today's vehicles it would be difficult for a small group of people to develop a vehicle from thin air, much would be drawn on previous examples. Rather cars are developed system by system. For example, the exhaust system would be developed separately where exhaust gas temperatures, pressures and cross-flow would be calculated, the life span of the components used in the exhaust, and materials science would be used to select materials such tools engineering societies use are CES, to help select and specify materials they wish to meet particular specifications. Largely safety, efficiency and environmentally friendliness are important in today's society as we wish to protect the driver and occupants, reduce our carbon footprint, and minimalize the fuel consumption which is partly intertwined with reducing the carbon footprint. If you wish to know more about the science behind vehicle construction, choosing a particular system or part would be a better approach, then there are 1000's and more books that cover each system.