Fluid Mechanics

#### Hydrostatic Pressure

- If an object is placed in a fluid, the fluid pressure will act upon
**the entire surface**of the area at**right angles.** - This is given by the general formula for stress:

\begin{align} \delta = \frac{F}{A} \end{align}

Where:

- $\delta$ is the Pressure (Pa)
- F is the force (N)
- A is the area ($m^{2}$)

Also, the **deeper** an object is put, the **higher the pressure.**

- This is given by:

\begin{equation} P = P_{0} + pgh \end{equation}

Where:

- P is pressure at depth h (Pa)
- $P_{0}$ is the pressure at the top (Pa)
- p is the density of the fluid ($kg/m^3$)
- g is the gravitational acceleration $m/s^2$
- h is the depth below the top (m)

- Neoprene is a suitable material for the hydraulic stoppers as it is resistant to grease and oil. It is also sufficiently flexible to make a good seal under pressure.

page revision: 2, last edited: 21 Jun 2011 07:54