Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also called gage pressure) is relative to the local atmospheric or ambient pressure.
Pressure in an automotive context refers to the force applied to a surface per unit area. This concept is essential in various systems and components in a vehicle, such as the fuel system, braking system, and tires.
The fuel system uses pressure to force fuel from the tank to the engine. In the braking system, pressure is applied to the brakes to stop the vehicle.
Tire pressure is also crucial as it affects the handling and stability of the vehicle, as well as fuel efficiency. Maintaining proper pressure in these systems is essential for an optimum operation of a vehicle.