What exactly does Archimedes principle mean?

Abstract: Archimedes (287 BC – 212 BC) was born in Syracuse, Sicily. Ancient Greek philosophers, mathematicians, and physicists determined the methods for calculating the surface area and volume of many objects.

It has designed and manufactured a variety of machinery, such as spiral water lifters, military projectors, etc. Archimedes traveled to Alexandria, and it is said that he invented the Archimedes-type screw pump during his time while living in Alexandria. In 260 BC, the principle of the lever and the law of buoyancy were discovered.

Archimedes' Law (Law of Buoyancy): Archimedes' Law is a fundamental principle of mechanics in physics. An object immersed in a liquid (or gas) is subjected to an upward buoyant force equal to the gravitational force of the liquid dislodged by the object.

The formula can be recorded as f float = g discharge = liquid ·g·v discharge.

Proof is that in a sufficiently large volume container, containing liquid, if the liquid in the container is stationary, then each part of the container of any shape volume of the stationary liquid is subjected to gravity and all forces except gravity The resultant force is a pair of balanced forces, because it is stationary, so the two forces are balanced, the magnitude is equal, and the direction is opposite.

Buoyancy generation conditions (causes):

1. Liquids have gravity.

2. Liquid stationary.

Then, liquid g = f-combined.

Suppose that the liquid of the cube is also affected by the liquid g = f, then.

Take out the liquid in this cube, and after taking out the liquid, the balance force loses gravity, and what remains is f-fit.

Then, put on other objects of exactly the same volume, let's say.

Metal block, then the metal block is subject to its own gravity, there is one.

The original resultant f-junction, in fact, this f-junction is the object receiving.

Buoyancy. F float = f combined = g liquid = liquid ·g·v discharge.

An important principle of hydrostatics, which states that an object immersed in a stationary fluid is subjected to a buoyant modus equal to the weight of the fluid discharged by the object, in a direction perpendicular upwards and through the centroid of the fluid being discharged. This conclusion was first put forward by Archimedes, so it is called Archimedes' principle. The conclusion is equally true for objects partially immersed in liquids.

The same conclusion can be generalized to gases.

Definition: An object immersed in a stationary fluid is subjected to a buoyant force equal to the weight of the fluid dislodged by the object, in a direction perpendicular upwards and through the centroid of the dislodged fluid.

Origin: Archimedes' discovery of the principle of buoyancy laid the foundation for hydrostatics. King Hiren summoned Archimedes and asked him to determine whether the crown of pure gold was adulterated. He meditated for many days

The floating-sinker principle is a fundamental physical law, also known as Archimedes' principle. It states that the buoyancy experienced by an object soaked in a liquid is equal to the weight of the liquid it excludes.

In other words, the amount of buoyancy experienced by an object in a liquid ambush is equal to the weight of the liquid it excludes, and the direction of the buoyancy is vertically upward, regardless of the density and shape of the liquid.

The importance of this principle lies in the fact that it explains why objects with a density smaller than liquid float on the surface of a liquid. For example, a block of wood will float on the surface of the water and a block of iron will sink to the bottom of the water, because the density of the block is less than that of water, so the buoyancy is greater than its gravity. The density of the iron is greater than that of water, so the buoyancy is less than its gravity.

In addition to the phenomenon of floats and sinks, there are many applications of the float sinker principle, such as when designing objects such as ships, balloons and airplanes, it is necessary to take into account the buoyancy to which they are subjected to to ensure that they can balance in air or water.

Archimedes' principle deduces that the clever Hu Cheng is:Depending on the cause of buoyancy, the pressure difference between the upper and lower tables. For example, a square piece of iron with a side length is sunk in the water, and the water depth is h.

The upper surface pressure p1 = g(h-a), the pressure is equal to the density of the liquid multiplied by g times the depth, the total depth of the water is h, the lower surface pressure p2= gh the height of the cube in the water a, the upper surface of the cube is h-a from the water surface

f buoyancy = a 2 p2 - a 2 p1 buoyancy is equal to the lower surface pressure minus the upper surface pressure, and the pressure is equal to the pressure multiplied by the area under force

=A2[ gh- g(h-a)] The base area of the cube is the square of the side length A2.

=a^2ρga。Prudence

=a^3ρg。

=vρg。

The volume of iron is the volume of water drained.

The scope of application of Archimedes' principle is:

Suitable for liquids and gases. Archimedes' principle applies to objects that are fully or partially immersed in a stationary fluid, requiring that the lower surface of the object must be in contact with the fluid.

If the lower surface of the object is not all in contact with the fluidFor example, a bridge pier that has been submerged in water, a shipwreck inserted into the seabed, a pile driven into the bottom of a lake, etc., in which case the force of the water does not equal the force specified in the principle.

This principle also does not apply if there is a significant flow of water relative to the object. The fish swims in the water, and the force calculated by Archimedes' principle is only a partial value due to the disturbance of the surrounding water. In these cases, the effects of hydrodynamics are taken into account.

The lifting force of the hydrofoil is much greater than the buoyancy force, which is a dynamic effect, and the law followed is different from that of statics.