## Buoyancy |

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In **buoyancy** (^{[1]}^{[2]} or **upthrust**, is an upward

For this reason, an object whose density is greater than that of the fluid in which it is submerged tends to sink. If the object is either less dense than the liquid or is shaped appropriately (as in a boat), the force can keep the object afloat. This can occur only in a ^{[3]}

The **center of buoyancy** of an object is the

- archimedes' principle
- forces and equilibrium
- compressible fluids and objects
- density
- see also
- references
- external links

Archimedes' principle is named after ^{[4]} For objects, floating and sunken, and in gases as well as liquids (i.e. a

Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object

— with the clarifications that for a sunken object the volume of displaced fluid is the volume of the object, and for a floating object on a liquid, the weight of the displaced liquid is the weight of the object.

More tersely: **Buoyancy = weight of displaced fluid.**

Archimedes' principle does not consider the ^{[5]} but this additional force modifies only the amount of fluid displaced and *Buoyancy = weight of displaced fluid* remains valid.

The weight of the displaced fluid is directly proportional to the volume of the displaced fluid (if the surrounding fluid is of uniform density). In simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. Thus, among completely submerged objects with equal masses, objects with greater volume have greater buoyancy. This is also known as upthrust.

Suppose a rock's weight is measured as 10

Assuming Archimedes' principle to be reformulated as follows,

then inserted into the quotient of weights, which has been expanded by the mutual volume

yields the formula below. The density of the immersed object relative to the density of the fluid can easily be calculated without measuring any volumes.:

(This formula is used for example in describing the measuring principle of a

Example: If you drop wood into water, buoyancy will keep it afloat.

Example: A helium balloon in a moving car. During a period of increasing speed, the air mass inside the car moves in the direction opposite to the car's acceleration (i.e., towards the rear). The balloon is also pulled this way. However, because the balloon is buoyant relative to the air, it ends up being pushed "out of the way", and will actually drift in the same direction as the car's acceleration (i.e., forward). If the car slows down, the same balloon will begin to drift backward. For the same reason, as the car goes round a curve, the balloon will drift towards the inside of the curve.

Other Languages

Afrikaans: Dryfvermoë

العربية: طفو

asturianu: Flotabilidad

Bân-lâm-gú: Phû-le̍k

беларуская: Плывучасць

български: Плаваемост

bosanski: Potisak

català: Flotabilitat

čeština: Vztlak

chiShona: Simudzo

dansk: Opdrift (statisk)

Deutsch: Statischer Auftrieb

eesti: Üleslükkejõud

Ελληνικά: Άνωση

español: Flotabilidad

فارسی: شناوری

français: Flottabilité

Gaeilge: Buacacht

galego: Flotabilidade

한국어: 부력

हिन्दी: उत्प्लावन बल

hrvatski: Uzgon

Bahasa Indonesia: Gaya apung

italiano: Galleggiante (fisica)

עברית: ציפה (פיזיקה)

Kreyòl ayisyen: Flotabilite

magyar: Felhajtóerő (hidrosztatika)

മലയാളം: പ്ലവക്ഷമബലം

Bahasa Melayu: Keapungan

မြန်မာဘာသာ: ဖော့ဂုဏ်

日本語: 浮力

norsk: Oppdrift

norsk nynorsk: Oppdrift

ਪੰਜਾਬੀ: ਉਤਪਲਾਵਨ ਬਲ

polski: Siła wyporu

português: Impulsão

română: Flotabilitate

русский: Плавучесть

Simple English: Buoyancy

slovenščina: Vzgon

srpskohrvatski / српскохрватски: Uzgon

suomi: Noste

svenska: Flytkraft

தமிழ்: மேலுதைப்பு

ไทย: แรงลอยตัว

Türkçe: Batmazlık

українська: Плавучість

中文: 浮力