Pressure in Fluids
In a fluid at rest, pressure increases with depth: P = hρg (hydrostatic pressure).
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Hydrostatic pressure
In a fluid at rest, the pressure at a depth h is P = P₀ + hρg, where P₀ is pressure at the surface (e.g. atmospheric), ρ is fluid density, and g is acceleration due to gravity. Pressure acts equally in all directions at a point.
✔ Key takeaway: Pressure in fluid: P = hρg (plus atmospheric if open).
💭 Think about this:
Why does a dam need to be thicker at the bottom?