What is Fluid pressure?
[[File: Hydrostatisches Paradoxon4.svg|thumb|The pressure to the red area is the same, in all three cases, even though the containers are different. This is known as [[hydrostatic paradox]].]] '''Fluid pressure''' is a measurement of the force per unit area. [[Fluid]] pressure can be caused by [[gravity]], [[acceleration]], or [[Force|forces]] in a closed container. Since a fluid has no definite shape, its pressure applies in all directions. Fluid pressure can also be amplified through [[Hydraulics|hydraulic]] mechanisms and changes with the velocity of the fluid. In a fluid column, as the depth increases, the pressure increases as well. Pressure (P) increases because as you go deeper, fluid at a lower depth has to support fluid above it as well. Therefore to define fluid pressure, we can say that it is the pressure at a point within a fluid arising due to the weight of the fluid. Pressure in liquids is equally divided in all directions, therefore if a force is applied to one point of the [[liquid]], it will be transmitted to all other points within the liquid. The pressure in fluids can be calculated using the following relation: '''P = ''hρg (Pressure = Height or Depth of the liquid × Density of the liquid × Gravitational pull (9.81m/s))'''''. Pressure is a scalar quantity. The [[International_System_of_Units|SI Unit]] (International System of Unit) of pressure is the Pascal, or Newton per meter squared (N/m^2). Points along the same depth will have the same pressure, while points at different depths will have different pressure. An object that is partly, or completely submerged in fluid experiences a greater pressure on its bottom surface than on its top surface. This causes a resultant force upwards. This force is called upthrust, and is also known as [[buoyancy]] For moving containers, the pressure changes,(Acceleration is the acceleration of the container)-. For a vertical acceleration in the upward direction, the pressure in fluids= P = ρh (g+a) For a vertical acceleration downward, the pressu