Define "stationary', really, it's not as easy as you think. They say that the only truly stationary 'object' is the center of the universe, and that everything is moving away from it. Effectively, nothing is stationary and all motion is relative. The equation relating pressure of a column of fluid is from hydrostatics, absolutely. But that gravity is included means that an acceleration is involved, 32.2 ft/second^2. The more general form uses acceleration instead of gravity, any acceleration. A similar situation occurs with weight. Weight is just the force that results from a mass under the acceleration of gravity. Accelerate your car at 1G and the reaction force opposite your direction of travel equals the weight of the car/driver.
Quote:
Can anyone on here verify if the fluid dynamics theory are based on stationary commercial applications? I'm thinking, that if that is so, then they, it, does not apply to fluid systems mounted onto accelerating vehicle like race cars, race boats, airplanes and rocket ships 
