What is the formula used for finding fluid forces?

The correct answer relates to the formula for calculating fluid forces, which is indeed represented as FAP. In the context of fluid dynamics, FAP stands for Fluid Area Pressure. This formula is essential for understanding how pressure within a fluid acts on a surface area to create a force.

When calculating fluid forces, the pressure exerted by the fluid can be represented as a product of the pressure (in force per unit area) and the area over which it acts. This leads to the fundamental equation: Force = Pressure × Area. Therefore, when looking for fluid forces, it is vital to recognize that FAP effectively captures this relationship in its abbreviation.

In contrast, the other options do not align with standard fluid force calculations. For example, PAT might confuse pressure with another term, and FDP and FAPD do not correspond to widely recognized formulas or concepts in fluid dynamics. Thus, understanding how pressure interacts with area to produce force is central to fluid dynamics, emphasizing why FAP is the correct choice here.