Physics in the second year of junior high school, buoyancy, Archimedes principle, seek detailed exp

Let me answer: 1. M object: It is the mass of the object that is ready to be put into the liquid.

2. G: It means that the object weighs 10N per kilogram, generally 10N kg.

3. Object: It is the density of the object that is ready to be put into the liquid.

4. V: The volume of the object.

5. Isn't this exactly Archimedes' principle: F float g row. Is it?

It can be proved by experiments, a beaker filled with water, weighs the gravitational force g of an object in the air, and then puts it in water, the number of spring scales will decrease, and it will be counted as f, and the part that decreases is exactly the magnitude of buoyancy, that is, f float g f.

And the object will expel some water, and then weigh this water, which is exactly equal to f float. That's it.

g m g = v g g

m is the mass of the object, and g is the acceleration due to gravity. Or a proportionality constant.

The density of the object.

The volume of the v-object object.

The two forces are balanced, and the buoyant force is equal to the gravitational force that displaces the liquid.

Archimedes' principle is an experimental law that has been summed up after countless experiments.

You don't need to ask why, you just need to use it, and learning physics is a process of understanding first.

g is the acceleration of gravity p matter is the density of the object m is the mass of the object v is the volume of the object the object floats on the surface of the liquid The buoyancy of the object is equal to the volume of the liquid dispelled by the object multiplied by the density and then multiplied by the acceleration of gravity Brother The back is very deep.

g is the gravitational force experienced by the object, m is the mass unit of the object kg, g is a constant value g =, this formula should be f float = p liquid v row g f float is the buoyancy force, p liquid is the density of the liquid, v row is the displacement of the object into the liquid, that is, the volume of the object.

The mass of the object.

Gravitational acceleration.

The density of the liquid.

The volume of the object.

The buoyant force experienced by the object is the result of the pressure difference between the upper and lower surfaces, and since the greater the depth, the greater the pressure, the pressure on the lower surface is greater than the pressure on the upper surface, i.e., the buoyancy is always upward.

Suppose an object is made of liquid, then the buoyancy force on it should be equal to its gravitational force because the forces are balanced.

Whereas, the pressure on the object is the same as that of the original liquid, so the buoyant force is equal to the gravitational force that displaces the liquid.

Buoyancy formula: f float = g row.

f float = liquid (liquid density) v row (volume of water discharged, v row = v matter) g (is a constant, m matter is the mass of the object.

A thing is the density of an object.

v is the volume of the object.

Analysis formula: F float = liquid v discharge g outflow liquid gravity = liquid xv substance (m matter) x g liquid v discharge g = liquid xv substance (m matter) xg

So f float = outflow liquid gravity.

m is the mass of the object.

g is the gravitational ratio.

A thing is the density of an object.

v is the volume of the object.

Because when an object enters the water, it expels a part of the water, and the volume of the water is equal to the volume of the object entering the water, and the mass of the water is equal to the buoyancy of the object.

m refers to the mass of an object.

g is the ratio of gravity to mass.

Plutonium is the density of an object.

The v-object is the volume of the object.

Archimedes' formula f row = p liquid v g row

So f float = g row.

M is the unit of weight kg

g is p is the density magnitude.

v is the volume. When a full glass of water is placed on top of the water or a half-floating object, wait for the weight of the liquid to flow out.

It's very simple, do experiments, think clearly by yourself, read the book clearly and then ask people!

<> Archimedes was a famous mathematician, physicist, and engineer in ancient Greece, who made great contributions to the fields of science and technology, mathematics, and physics in ancient Greece.

The process by which Archimedes discovered the law of buoyancy is this:

1.Archimedes first considered the problem of buoyancy when solving the problem of supporting bridges. He found that the support columns of the bridge should not be placed directly on the water, but on the bottom of the water, otherwise the bridge would sink into the water.

2.In order to better understand the principle of buoyancy, Alek Kimedes developed a buoyancy model. He made a scale rod made of copper sheets, and placed items of different weights at one end and water at the other end. He found that as the weight of the item increased, so did the erection of the weighing rod.

3.Archimi Yosedan Sode introduced the law of buoyancy. He observed that the buoyancy generated by different weights in the water is the same, just in a different direction.

He concluded that the buoyancy generated by an object in a fluid is equal to the density of the fluid multiplied by the volume of the object multiplied by the degree of acceleration of the sail by gravity. This is what we now know as the law of buoyancy.

4 minutes for you to thoroughly understand Archimedes' law of buoyancy.

Archimedes, Archimedes, Archimedes, Archimedes.

Archimedes' buoyancy principle:

Archimedes' law is a fundamental principle of buoyancy in physics. Specifically, an object immersed in a liquid or gas is subjected to a buoyant force that is equal to the weight of the liquid or gas discharged by the object.

Buoyancy is the net effect of all the action of an object by the pressure of the fluid from head to bar. The formula can be recorded as: ffloat g discharge · g·v discharge.

Archimedes' law is an important principle of hydrostatics, which states that an object immersed in a stationary fluid is subjected to a buoyant force equal to the weight of the fluid dislodged by the object.

The direction is straight upwards and passes through the centroid of the fluid discharged, this conclusion was first proposed 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.

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 entirely in contact with the fluid, if the pier is submerged by water, a shipwreck inserted into the seabed, a pile driven into the bottom of the lake, etc., in this case, the force of the water is not equal to the force specified in the principle.

This principle also does not apply if there is a significant flow of water relative to the object, and 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.

Archimedes didn't discover the law of buoyancy while bathing, and later generations made up legends!!

According to Scientific American magazine on June 11**: The story of Archimedes' discovery of the law of buoyancy is widely circulated, and it has long been believed that he suddenly discovered the law of buoyancy while taking a shower and ran naked into the street shouting "I found it!" ”。

But in fact the story is probably just a beautiful **, Archimedes discovered the law of buoyancy after a lot of complex and painstaking research, and not sitting in a bathtub.

Archimedes spent a great deal of time elaborating on the laws of buoyancy and the principles of leverage, including the phrase that made him famous: "Give me a fulcrum, and I can pry up the earth."

The results of research on pi and other mathematical and physical studies are also recorded. But Archimedes himself did not record the bathing at all.

The earliest authoritative exposition of the story of Archimedes streaking and exclaiming, "I have discovered", was Vitneuvius, the originator of Roman architecture. He told this story in the first century A.D. in the introduction to the ninth edition of his textbook on architecture. But the "bath", if it happened, was almost 200 years before the book was published.

Therefore, scientists believe that this story is artificially elevated on a certain basis.

Loris Laures, a mathematician at the University of Pennsylvania in the United States, said: "Vitneuvi must be mistaken, using the method of volume measurement is theoretically feasible, but if you try it in real life, you will find that the real world is carried out in its own way, and the theoretical ones are not feasible at all." "It is not reliable to measure the volume of water because the surface tension of the water makes it very difficult to measure the volume.

Even Galileo doubted the authenticity of the legend of Archimedes, and Galileo said in one of his books called "Micro-Equilibrium" that scientists with similar ideas to Archimedes could use the principle of levers and precise measuring tools to obtain more accurate results, which were also very common in ancient times.

Loris eventually concluded that Archimedes did measure the volume, but not in the bathtub, and that Archimedes running naked on Siracles Street and exclaiming "I found it" is also not credible. But it is undeniable that the legend of bathing has added a magical color to the law of buoyancy, so much so that it has been talked about and widely spread by later generations.

Junior High School Physics Pressure Liquid Pressure Experiment.

The library should have a detailed or go to the education column to see if there should be.