Pressure & Buoyancy

Pressure in a fluid increases with depth, and buoyant force equals the weight of fluid displaced (Archimedes' principle).

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Overview

P = P₀ + ρgh for fluid pressure at depth h. Archimedes' principle: F_buoyant = ρ_fluid · V_displaced · g. An object floats when its buoyant force equals its weight.

Practice Quiz

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An object floats partially submerged in water. What must be true?