What is Hydrostatic Pressure?
It is defined as the force exerted by a liquid or fluid that is static or at rest. Hydrostatic pressure is characterized by being used and occurring from the own weight of the liquid substance, it does not require another impulse. In this way, the density, the acceleration of gravity and the depth of the fluid are considered essential. Other aspects such as mass and volume are irrelevant. It is important to remember that this type of pressure works hand in hand with atmospheric pressure, as this is responsible for exerting pressure on liquid substances .
In this sense, it is important to mention that this type of pressure is characterized by two fundamental factors. The first of them is based on the principle of a contained liquid substance, this will always be driven by outward pressure. Even depending on the pressure force, it can be fired in a similar way to a projectile. For its part, the second principle focuses on the force exerted against the surface of a body. In this case, the hydrostatic pressure occurs when the surface is surrounded and submerged in the liquid or fluid.
Then the hydrostatic pressure is known as a force directly exerted on a still object and surrounded by liquid. This is constant and continues, it does not vary unless there is movement. Similarly, the denser or thicker the fluid, the more pressure the object or body will perceive . It is necessary to mention that if these begin to move, they stop being named as hydrostatic pressure, their name changed to hydrodynamic pressure. Hydrostatic and hydrodynamic pressure are generally used for calculations and measurements in physics.
Elements of the formula to calculate this type of pressure (P = d × g × h)
- Hydrostatic Pressure: It is represented through the capital letter ‘P’ and is measured through pascals. That is, the pressure force in newton, which is equal to one on a square meter.
- Density of liquids or fluid: It is expressed through the lowercase letter ‘d’ and is measured in units of force on a square meter. Density is understood as the pressure force with which the surface of the object or body meets and comes into contact.
- Gravity acceleration: It is identified by the lowercase letter ‘g’ and is measured through meters over second squared. It is known as the pressure due to the force of gravity to which the liquid is subjected.
- Height of the fluid: In this the lowercase letter ‘h’ is used, it is understood as the height that the liquid has over the object under pressure. The higher you are, the more hydrostatic pressure you will feel.
Examples of hydrostatic pressure
- The pressure that the liquid exerts on the walls of a water tank.
- Divers who go deep into the ocean are subjected to great hydrostatic pressure.
- Soda bottles that are under pressure from liquids and gases .
- A pool has hydrostatic pressure because its walls function as a container for liquids.