What is the reason why a ship made of steel can float on the water?

To illustrate this problem, we can do an experiment: put a thin sheet of iron in the water, and it immediately sinks; If you make this iron sheet into a box, the weight does not change, but it can float on water; Not only that, but if you put something in the box, the box will only sink a little and still float on the water. This is because the bottom surface of the box is subject to the pressure of water, and this pressure is the vertical upward buoyancy, as long as the buoyancy is greater than the weight of the iron sheet, it will hold the iron box so that it will not sink.

Of course, the pressure of water is also affected around the iron box, but the pressure on the front and back sides of the box is equal in magnitude and opposite directions, canceling each other out; The pressures on the left and right sides also cancel each other out. The buoyancy increases with the depth of the water and increases with the volume of the part of the object submerged in the water. Because the volume of the iron box is much larger than that of the iron sheet, the weight of the water discharged is also much larger, and the buoyancy obtained is also larger, so the contents of the box can still float on the water.

The same is true for large ships that can float on water. The law of the floating and sinking of objects was discovered by the Greek scholar Archimedes more than 2,000 years ago, who accurately said: "The magnitude of the buoyancy acting on an object in water is equal to the weight of the water discharged by the object".

Why does a huge steel cruise ship float on the water?

Steamships are made of steel plates that can displace more volume of water, and the buoyancy experienced by the steamer while in the water is equal to the gravitational force of the discharging water. The buoyancy of the ship can be equal to or greater than the gravitational force of the steel plates used to make the ship, so it can float on the water.

Steamship: It is made of steel that is denser than water to make a hollow core, so that it can float on the water, and the size of the ship is usually expressed in terms of displacement. The displacement of a ship refers to the gravitational force of the water that is discharged after the ship is fully loaded, that is, the buoyancy of the water when the ship is fully loaded.

Modern large ships are made of steel, which is more than 7 times heavier than water; The cargo carried by the ship, such as food, machinery, construction equipment, etc., is also much heavier than water, so why can the ship still float on the water with such heavy things? It turns out that an object immersed in a liquid is subjected to an upward buoyant force equal to the weight of the liquid discharged by the object. If the volume of the object immersed in water is v and the specific gravity of the water is d, then buoyancy:

f=v·d。The specific gravity of steel is large, and the solid steel block will naturally sink in the water, but when building a large steamship, it is not to pile up the steel block, but to make most of the bitong in the steamer empty. To increase the buoyancy of water, it can be seen from the above equation that the volume v can be increased, and the specific gravity d can also be increased.

In fact, the specific gravity d of water is basically constant, so the only thing to do is to increase the volume v. We can do a little experiment to illustrate this problem: put a thin piece of iron in the water, and it will sink quickly; If you make this piece of iron into a box, the weight does not change, but it can float on water; Moreover, even if there are some more things in the box, the number of traces of the box will only sink a little, and it can still float on the water.

This is because the volume of the iron box is much larger than that of the iron sheet, and the weight of the water discharged is much greater, and the buoyancy obtained is also much larger. Only if the buoyancy is greater than the weight of the iron sheet, the iron box will not sink. The buoyancy increases as the volume of the submerged part of the object increases, so that the contents of the box can still float on the water.

The volume v of the large ship is greatly increased when the interior is empty, so that the large ship made of steel can float on the water. The law of the rise and fall of objects was discovered by the Greek scholar Archiz Ruler Medes more than 2,000 years ago, who accurately said: "The magnitude of the buoyancy acting on an object in water is equal to the weight of the water discharged by the object."

For although the steamship was made of steel, the cabin was empty, and the weight of a hollow ship was much smaller than that of a solid iron of the same volume. Any object in water is subject to the buoyancy of the water, and the buoyancy increases as the volume of the object immersed in the water increases. Ships are large in size, and the amount of water they displace is very large, and the buoyancy they are subjected to is also very large.

According to the principle of buoyancy: the buoyant force experienced by an object in water is equal to the gravitational force of the water it displaces. The gravity of the water discharged by the ship is sufficient to balance its own gravity, so the ship can float on the water.

The reason why a ship made of steel can float on the water is that the buoyancy of the water on the ship is equal to the gravitational force of the ship, and the two forces are balanced.

Although the hull was made of steel, the inside was empty, which meant that the ship was much larger than the steel itself.

According to Archimedes' principle: "The buoyancy of an object immersed in a liquid is equal to the gravitational force of the liquid it displaces".

The volume of the ship is very large, and the water discharged is naturally a lot, because the buoyancy of the ship is equal to the "gravity of the discharged water", so the buoyancy is also very large, when the buoyancy is equal to the "gravity of the ship", the ship can float on the water.

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 discharged by the object, in a direction perpendicular upwards and through the centroid of the fluid being 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.

In simple terms, water gives to objects.

The buoyancy provided is judged based on the volume of water discharged by the object, and the greater the mass of the water discharged, the greater the buoyancy provided. Therefore, it is generally said that solid objects can float on the surface of the water only if their density is smaller than that of water. But an object like a ship that can drain a lot of water can't be judged in this way!

Because its average density is less than that of water.

According to Archimedes' principle, the buoyant force experienced by an object immersed in a liquid is equal to the gravitational force by which it displaces the liquid. When the gravitational force of an object is greater than the buoyancy force on which it is subjected, the object sinks; When its gravity is equal to or less than the buoyancy force it is subjected to, the object will float or float upward.

A ship made of steel can float on the water because its gravity is equal to its buoyancy (i.e., the gravity of its displacement).

Let's take a look at the buoyancy algorithm first.

f = density of the liquid xg

x the amount of the object that is lined up.

Different East. In the case of the same density of the liquid, the volume of water that can be drained is directly proportional to the appearance of a ship made of rigid iron, as you know, in order to be able to drain water better and increase buoyancy.

If the water were to enter the cabin of the ship, the ship would still sink.

In general, the greater the displacement of the ship.

The more stuff you carry.

The reason why a ship made of steel can float on the water is that the buoyancy of the water on the ship is equal to the gravitational force of the ship, and the two forces are balanced. How can the buoyancy of the water on the boat be equal to the gravitational force of the ship? According to Archimedes' principle, the buoyancy of an object immersed in a liquid is equal to the gravity of the liquid it displaces, and the volume of the ship is large, and the amount of water discharged is a lot, because the buoyancy is equal to the "gravity of the discharged water", so the buoyancy is also very large, and when the buoyancy is equal to the "gravity of the ship", the ship can float on the water.

The buoyancy force is greater than the gravity force.

Reason: The amount of buoyancy is determined by its volume in the water, as long as the volume of the boat in the water is large enough, then the boat can be lifted.

Because its interior is hollow, the gravity is less than the gravity of the same volume of water, according to Archimedes' law, the buoyancy is equal to the displacement gravity, and it will not be less than the ship's own gravity, so it can float.

Similarly, a 100-meter-long paper boat is much lighter than an iron boat, so why can't it float on water.

1. A ship made of steel can float on the surface of the water because the amount of water discharged from it is greater than its own weight, that is, its buoyancy is greater than its own gravity.

2. Buoyancy refers to the force experienced by an object in a fluid (liquid and gas) in the opposite direction of its weight, and the difference (resultant force) from the pressure of the fluid (liquid and gas) on each surface. When the top interface of a buoy does not touch the liquid, only the pressure acting upward on the bottom interface will produce buoyancy. As for an object located on the bottom surface of the container, this phenomenon is not much, because as long as there is a very thin liquid film in between, such as Bi Noise, the pressure can be transmitted, and there is an upward pressure on the bottom surface, and there is a pressure difference between the upper and lower surfaces of the object, and the object will be subject to buoyancy slag.

Because the boat is in the water, its underwater part is submerged in the water, and the volume of the underwater part is the volume of the water that the boat discharges. The weight of this part of the water that is discharged is the upward buoyancy of the water on the ship (that is, the force of the water to lift the boat upwards and make the ship unsinkable) This upward buoyancy is equal to the weight of the whole ship, so the ship will not sink downward. <

Because the boat is in the water, its underwater part is submerged in the water, and the volume of the underwater part is the volume of the water that the boat discharges. The weight of this part of the water that is discharged is the upward buoyancy of the water on the ship (that is, the force of the water to lift the boat upwards and make the ship unsinkable) This upward buoyancy is equal to the weight of the whole ship, so the ship will not sink downward. Archimedes' law of buoyancy states:

An object immersed in a stationary fluid is subjected to a buoyant force equal to the weight of the fluid discharged by the object, vertically upwards and through the centroid of the discharged fluid. 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.

Ship or ship refers to any means of transportation that uses the buoyancy of water to pull and pull, pull, push, row, or push propellers and high-pressure nozzles by using the buoyancy of water, relying on manpower, sails, engines (such as steam engines, gas turbines, diesel engines, nuclear power units) and other power to enable movement on water. In addition, civil ships are usually called boats (ancient known as boats), ships, engines, and boats, military ships are called ships (ancient names are ships), ships, and small ships are called boats, sampans, rafts or boats, which are collectively called ships or ships.