By referring to Figure 1, explain why the atmospheric pressure, Patm can be subtracted when analyzing hydrostatic forces on submerged surfaces. Patm h IK = h DII

CONCEPTUAL QUESTION - Hydrostatic Forces in Layered Fluids How do you get the centroid of the inclined shape like in the picture? Like for F1 = PcgA1, you obviously need the centroid and the area, so how do you get it if it's inclined? Can anyone give an example?

There are various methods that can be used to calculate the hydrostatic force on a submerged surface. Which of the following statements are correct? (i) (iii) The pressure prism method gives good understanding of the fundamentals but it can only be used for plane surface uniform in the spanwise direction. The parallel axis theorem can be used for surface not uniform in the spanwise direction such as a circular or triangular plane surfaces, but it is limited to simple geometry where the second moment of area can be easily defined. The elementary area method can be used for any 2 or 3 dimensional surface as long as the geometric unit normal vector is known at any point on the surface. (A) (B) (C) (D) (i) and (ii) (i) and (iii) (ii) and (iii) All of the above The Eulerian frame of reference is commonly used in analyzing fluid problems instead of the Lagrangian frame of reference. The main differences between these 2 frames of reference are: (i) The steady motion in Lagrangian frame of…

In the figure below, gate AB is circular. Find the moment of the hydrostatic force (in N-m) on this gate about axis A. Water A B 3 m 2 m _Ł