The mass remains the same, but the volume decreases, will the gravitational force increase? Why?

Gravitational force The force of mutual attraction that exists between all matter, i.e., the gravitational force, is related to the mass of the object, the formula of operation: f=gmm r 2 So when the mass of an object of a certain volume does not change, even if the volume becomes small, it will not significantly increase its gravitational force on other objects. Of course, this is not the case for behemoths like planets and stars, because their own volume is large, which causes their distance from other planets to become larger when their size is smaller, so the gravitational force becomes smaller.

Of course, it will increase, and the star will evolve into a white dwarf in the late stage, and the larger one will be a neutron star (on which a person's bones can be crushed into powder), and the bigger one will be a black hole. Because the volume collapse leads to an increase in the strong force (one of the four major forces), there may be other theories, but this is my opinion.

The formula for calculating the gravitational force is f=gmm r 2, which is related to the distance between the mass and center of mass of two objects and has no direct relationship with the density of the object. But the gravitational field and the density of an object are related (just like the electric field), the higher the density, the stronger the gravitational field. If you're interested, you can check out extracurricular books, such as Stephen Hawking's A Brief History of Time, as well as books on Einstein's general theory of relativity.

No, gravity is only about distance and mass.

Because according to the law of gravitation, the greater the mass of an object, the greater the attraction to each other; It is likely that gravity is in the form of curvature of space-time, which acts on the surface of other objects, and also affects the constant change of space around us.

We all know that in nature, one of the most amazing forces is "gravity". Gravity not only allowed Newton to open the door to modern science, but also directly led to the formation of the classical physical system; To this day, it is still the most mysterious force among the "four powers".

According to the gravitational force formula, the greater the mass, the greater the gravitational pull of the object; As for where gravity comes from, it is a natural "attraction" of an object, and gravity will always exist whenever and wherever it is. This is an eternal theorem in the three-dimensional universe, and no one can tell you back to the source;

What exactly is the "source of the source" of gravity involves the ultimate secret of physics. However, according to the "superstring theory" that emerged in the twentieth century, gravity comes from the "string". The string is the "basic element" that maintains the stable existence of the world, from the eleventh dimensional space to the three-dimensional world.

The strings are currently invisible and intangible, but their interaction leads to everything: electromagnetic force, gravity, photons, etc., etc., etc. Of course, this theory remains unproven.

However, the reason why "gravity" can affect everything is largely determined by its nature.

According to the "general theory of relativity" of the famous physicist Albert Einstein in the last century, gravity actually represents a kind of bending and compression of time and space. Thus, Einstein predicted the emergence of "black holes" and "gravitational waves";

The gravitational pull carried by objects changes the structure of space, so everything seems to us to be affected by "gravity". This is a variation of the form of "solid geometry".

The greater the mass, the greater the weight of the object, so the gravitational force will be greater. Gravitational force is created on an object through action and reaction.

Because according to the law of gravitation, the greater the mass of an object, the greater the attraction to each other; It is likely that gravity will take the form of a curved time and space, thus acting on the surface of other objects and also affecting the space around us. Constantly changing.

This is a property of space-time, where space and time bend towards the object due to the gravitational attraction due to the large gravitational attraction of the object with a large mass; If the massive object itself is still rotating, then this space-time region will have a significant drag effect.

The greater the mass, the greater the gravitational pull, thumbs up.

Yes. First of all.

Correct it. is when approaching.

The speed of light will. Appear! ~~

Because the positive energy gathered by matter increases (the positive energy increases with the increase of velocity, but not mv 2 2, which is only about the same value, applicable to macroscopic low-velocity objects, the complete formula will be mentioned in the second year of high school textbook), and we know that e=mc 2 When the energy increases, the speed of light is inconvenient, and the mass naturally increases (Note: the energy here is kinetic energy, and static energy is generally not suitable for conversion, but it can be released by fusion or fission, both of which meet the mass-energy equation).

To put it simply, there is a certain relationship between mass and energy (which can be seen in the mass-energy equation). The greater the energy, the mass (here referring to the moving mass; The static mass is constant). The greater the speed of the object, the greater the kinetic energy, and the more difficult it is to change the state of motion of the object, that is, the greater the mass (the physical meaning of mass is how easy it is for an object to change its state of motion).

A photon does not have a mass at rest, but it has a moving mass.

This is the result of the introduction of the theory of relativity.

In Newtonian mechanics, the mass of an object does not change with velocity, so the velocity of an object will rise in a straight line under the condition of an external force, even exceeding the speed of light, which is not possible. In the theory of relativity, the mass of an object increases as its velocity increases. In this way, in the case of an external force on the object, as the velocity increases, the mass of the object increases (i.e., the inertia increases) so that the speed of light is not exceeded.

You can be in: Take a look at the formula for velocity under relativistic conditions.

Photons have no rest mass.

According to the gravitational formula f=gm r 2, we know that g is the gravitational constant, m is the mass of matter, and r is the distance between two objects.

The larger the f, the larger the m, or the smaller the r!

The gravitational force is generally referred to as the gravitational force, and the gravitational force is proportional to the product of the masses of the two substances.

The greater the mass, the greater the gravitational pull. This is because the gravitational force is directly proportional to the mass of the object. According to Newton's law of gravitation, the gravitational force between two objects is directly proportional to their mass and inversely proportional to the square of the distance between them.

For example, the Earth and the Moon interact with gravity, and the Earth's gravitational pull on the Moon is stronger because the Earth's mass is greater than the Moon's. This also explains why there is gravity on Earth, and gravity on the Moon is much smaller than on Earth.

The magnitude of the gravitational force likewise depends on the distance between the two objects, and this is because the gravitational force is transferred between the two objects, so the farther the distance, the less the gravitational pull. If two objects are close to each other, the gravitational pull will be more significant.

However, it is important to note that gravity is not present between all matter, and only matter with mass exerts gravitational force on other matter. Since photons have no mass, there is no gravitational interaction between photons.

In general, it is a law of general application that the greater the mass produces a stronger gravitational pull. In other words, if two objects have equal mass, the gravitational force between them will be equal. This is one of the very important principles in the foundation of physics, and it is of great significance for both scientific research and engineering applications.

There is no necessary connection between the magnitude of gravity and the size of the volume of the object, we cannot confuse volume with gravitational force and other physical quantities, we must clearly identify which physical quantities gravitational force is related to, in order to correctly calculate the magnitude of gravitational force and distinguish the difference between the concept of gravitational force and other forces.

The saying that the gravitational force is large and the gravitational force is small when the volume is large is not true, it is that the greater the mass, the greater the gravitational force, and the smaller the mass, the smaller the gravitational force.

Wrong. Gravitational force has nothing to do with volume, only with mass, and the greater the mass, the greater the gravitational force.

No, because the magnitude of gravity is not determined by volume, but by the structure of the matter itself.

It is the greater the weight, the greater the gravitational force, and the smaller the weight, the smaller the gravitational force.

This is a good question that has a simple but very important answer: the (weak) equivalence principle, which is the equivalence of gravitational force and inertial mass.

Inertial mass is the ability of an object to resist. The greater the inertial mass of an object, the harder it will be to accelerate, even if no other force (friction, air resistance, etc.) will hinder it.

Gravitational mass describes the strength of an object's response to a gravitational field. The greater the gravitational mass of an object, the greater the gravitational force acting on it.

So there you have the answer: an object that weighs twice as much does experience twice as much gravitational pull; But it is also resistant to twice as much force because its inertial mass is also doubled.

Remember Newton's formula? The force is the mass multiplied by the acceleration, f=ma?In this equation, the mass m is the inertial mass.

So the force f determines the acceleration a. But what is this force? In the case of gravity, it is f=mg, and g is the acceleration due to gravity, which denotes the gravitational field.

In this equation, m is the gravitational mass. But according to the principle of equivalence, these two qualities are the same. So when we combine these two equations, mg=ma, m represents the same quantity on both sides, which can be removed.

A=G remains. That is, the acceleration a of any object is g, the acceleration due to gravity, the mass m of the object is removed, it has no role in the equation.

If these two masses are not equal: if the inertial mass and the gravitational mass are not equal, mi≠mg (I now distinguish them by subscript), then the acceleration of the object will be determined by mia=mgg, or a=(mg mi)g. That is, it is directly proportional to the ratio of the gravitational mass and inertial mass of each object, mg mi.

But according to the principle of equivalence, this ratio is 1 for every object, for every substance.

This is not the case with electrostatic forces, for example. The force acting on an object is directly proportional to its charge q. The ability of an object to resist this force is still directly proportional to its mass m.

So the charge-mass ratio q m determines how the object reacts to the electrostatic field, and different objects react differently. Gravity is unique and special because of the principle of equivalence.

Because the gravity of the earth is equal, objects can land at the same time under the same gravity conditions.

Because a heavy object encounters greater resistance than a light object when it falls, gravitational force is actually the force between two objects, which is inversely proportional to the square of the distance, so this happens.

The reason for the occurrence of gravitational force (brief description): When the high-energy particles moving in the universe pass through matter (celestial bodies or particles), part of them are intercepted and absorbed to form a weak energy region (Einstein's space-time curvature), which is the gravitational range mv2=e=mv2 (the formula of the law of conservation of energy conversion). For more details, please see the forthcoming gravitational hypothesis, "Elemental Periods and the Causes of Gravitation".

Because no matter what the object is on our earth, the speed of descent is the same, and the gravitational force on the earth is not affected by the mass of the object.

"Gravitational pull" is generally understood as the centripetal "gravitational force" released by the Earth's core. This is wrong.

What is released by the Earth's core is the resistance of thermal expansion, which fuses with the centripetal pressure of space to form a geomagnetic field.

The centripetal force in the geomagnetic field is the resultant force of the two forces.

In space, objects of different masses are subjected to the centripetal pressure of space in a three-dimensional manner and float irregularly.

In the geomagnetic field, the masses are on the space centripetal pressure line of the Earth, and at the same time are resisted by the thermal expansion released by the Earth's core.

As long as they are of the same kind, the different masses themselves release the same force of thermal expansion, and they fall at the same speed.

If the thermal expansion forces emitted by the same kind, the same and different masses themselves are not the same, then they fall at different speeds.

For example, high-temperature iron and low-temperature iron have the same quality, but the falling speed is different.

Not gravity acts on all objects. Rather, all objects are moving and changing, and they have a gravitational attraction in themselves. Everything flows and moves, and movement is force, power. The forces are interacting, and this is the attraction, the repulsive force.

Chen's model of the universe: Because the formation of gravity is based on the direct agent, it is not the mass itself, but the dark energy.