An object with a gravitational force comparable to that of the Earth falls faster than an iron ball

First of all, there are a lot of ambiguities in your question, first of all, you have to understand the difference between gravity and gravity, for high school physics, the speed of the fall of the object depends on the acceleration of gravity and the initial velocity of the object itself, not considering the role of the earth and the object in other environments, the gravitational acceleration is not the same in different places, in the same place, if the initial velocity of the object is the same, the speed of the fall of the two objects is the same, and the word "falling" can only be limited to the surface of the earth.

Gravity is the force that exists between two objects, and if there is no gravitational force on an object, gravity cannot be a property specific to an object like mass or volume. It is wrong to say that gravity can only exist between two objects, and it is not possible to say how great the gravitational force of a certain object is.

The difference between gravity and gravity is that gravity can only be used on the earth's surface, it can be said that it is a part of gravity, both are forces of the same nature, but gravity is only applicable to classical mechanics, gravity can be used for celestial bodies (macroscopic), particles (microscopic), etc., any physical theory is only applicable within a certain range, once beyond this range will not be able to adapt, this is also the essence of classical mechanics and modern mechanics, high school physics is in classical physics**, Just as the conservation of energy can only be applied to the extent that we currently know, there are too many unknown things, and maybe this theory will be overturned in the unknown space, of course, these are some of my own opinions.

If the falling of the two objects you are talking about, if they are both in the same position on the surface of the earth, and the initial velocity is the same, then the falling velocity is the same, if it is something inside the earth and something outside the earth, then they are not in the same position, the speed at which they fall is not the same, if the initial velocity of the object outside the earth is the same as the position in which they are located, then the velocity behind the two is also the same, (only consider the interaction between the earth and them), in short, the problem of motion is related to force and velocity, Acceleration is related, gravitational force is also a force by v = v initial + at, and f = ma even a formula v = v initial + (f m) t,、、 the formula in the depressed formulator can not be pasted on.

Studying physics is about bold conjecture and thinking.

It's as fast as the earth......People have velocity on both balls.

You only have an iron ball with a speed ......Surely the two Earths first came into contact.

It's a mess. According to the law of ox 3, the gravitational force of any object on the earth on the earth = the gravitational force of the earth on the object, but in the opposite direction... If the ratio of the air resistance of the falling object to its own mass is k, then which object has a smaller k value and which object lands faster.

There is a lack of conditions in the question, and the phrase "an object with a gravitational force comparable to that of the Earth" is vague.

It should be just as fast, this has nothing to do with quality, but this thing will suck the earth over, it's a little hard.

Hehe, can this brother take another earth to the tower? Hehe, first of all, the tower collapsed.

In addition, it's hard to say whether this thing will fall to the earth, maybe the earth will fall to his side After all, there is one more person and an iron ball here, considering it as a whole, the mass is larger than the earth, and under the gravitational force of the same size, the acceleration of the small mass is large, and it seems that the status of this thing has fallen.

There is something wrong with that.

Galileo. He was one of the great Italian scientists of the 17th century. When he was in school, his classmates called him a "debater". The questions he asks are unusual and often difficult for teachers to answer.

At that time, those who studied science believed in Aristotle.

Take the words of this Greek philosopher more than 2,000 years ago as an unchangeable truth.

Whoever doubts Aristotle is reproached: "What do you mean? Is it against human truth? ”

Aristotle once said, "Two iron balls, one weighing 10 pounds and the other weighing 1 pound, fall from a great place at the same time, and the 10-pound one must hit the ground first, and the speed is 10 times that of 1 pound." This sentence raised Galileo's questions.

He thought: If this sentence is true, then tie these two iron balls together, and the one that falls slowly will drag the one that falls fast, and the speed of falling should be slower than that of a 10-pound iron ball; However, if you look at the two iron balls tied together as a whole, they weigh 11 pounds and should fall faster than the 10-pound iron balls.

In this way, two opposite conclusions can be drawn from one fact, how can this be explained?

With this question in mind, Galileo repeated many experiments, and the results proved that Aristotle's statement was indeed wrong. Two iron balls of different weights fall from a high place at the same time, always hitting the ground at the same time, and the speed at which the iron balls fall has nothing to do with the weight of the iron balls. Galileo was only 25 years old at the time, already a professor of mathematics.

He announced the results of the experiment to the students, and at the same time announced that he would conduct a public experiment on the leaning tower of the city of Pisa.

Word spread quickly. On that day, many people came around the Leaning Tower to see who was the victor in this matter.

It was the ancient philosopher Aristotle, or the young mathematics professor Galileo?

Some said, "This young man is so bold that he wants to find fault with Aristotle!" Some said: "He won't be stubborn after a while, the truth is ruthless, and it will make him lose face!" ”

Galileo appeared on top of the Leaning Tower. He holds a 10-pound iron ball in his right hand and a 1-pound iron ball in his left hand. The two iron balls came out of their hands at the same time and fell from the air.

After a while, the people around the leaning tower couldn't help but cry out in surprise, because everyone saw that the two iron balls hit the ground at the same time, just like Galileo. Only then did everyone realize that great philosophers like Aristotle were not all right.

It's a matter of physics. Because the height is equal to one-half multiplied by the acceleration of gravity multiplied by the square of the falling time. So the time of falling depends only on gravitational acceleration and altitude.

It has nothing to do with the mass of the object. And the gravitational acceleration in the same place is the same. So falling from the same height landed at the same time.

But this is calculated with the ignoring air resistance. If you take 1 catty of iron and 1 catty of cotton at the same time, calculate the air resistance, because the density of 1 catty of iron is much greater than that of 1 catty of cotton. Therefore, the air resistance of cotton is greater than that of iron.

So that it won't land at the same time.

It's a physical problem. Because the height is equal to half of the acceleration due to gravity multiplied by the square of the descent time, the descent time depends only on the acceleration and altitude of gravity. It has nothing to do with the mass of the object.

The acceleration due to gravity at the same location is the same. Therefore, falling from the same height means falling at the same time. However, if you put 1 kg of iron and 1 kg of cotton at the same time, calculate the air resistance, then ignore the air resistance, calculate the air resistance, because the density of 1 kg of iron is much greater than the density of 1 kg of cotton, so the air resistance of cotton is greater than the air resistance of iron.

In this way, it does not land at the same time.

Ignoring air resistance, two iron balls of different mass (different diameters or different sizes) and the same height will land at the same time. If it does not land at the same time, then it depends on the difference in the shape of the two iron balls of different masses or other factors.

Two iron balls of different weights fall at the same height. The smaller one landed first. Who lands first depends on the amount of resistance he encounters during his descent, and has nothing to do with weight.

It can only depend on their initial velocity, and if the initial velocity is not the same, the landing time will be different!

Two iron balls of different weights should be heavier, and the one that lands first depends on its mass.

No, the attraction of the earth to objects is the gravitational force, which is different from gravity, and you must pay attention to this difference, which will be used in many problems.

Gravity is the force that an object is subjected to due to the attraction of the earth.

Gravity is not equal to the gravitational pull of the Earth on an object. Due to the rotation of the earth itself, in addition to the poles, objects in other places on the ground are moving in a uniform circle around the earth's axis with the earth, which requires a centripetal force pointing perpendicular to the earth's axis, and this centripetal force can only be provided by the earth's gravitational force on the object, we can decompose the earth's gravitational force on the object into two components, one component f1, the direction points to the earth's axis, and the magnitude is equal to the centripetal force required for the object to move in a uniform circular motion around the earth's axis; The other component, g, is the gravitational force on the object. Because the centripetal force of the object is very small, in general, it can be considered that the gravitational force of the object is the magnitude of the gravitational force, that is, the effect of the rotation of the earth can be omitted in general.

Wrong. One part of the gravitational force provides the centripetal force of an object to rotate around the Earth, and the other part is the measurable gravitational force.

But because the centripetal force is small, it is generally ignored. So gravity can be approximated to equal the attraction of the earth to an object.

However, at the poles, the centripetal force is 0 and the proposition holds.

The attraction of the earth to objects is the gravitational force, gravity is not equal to the gravitational force, gravity is only a component of gravitational force, and the other component of gravitational force is the geostrophic deflection force.

The law of gravitation was published by Isaac Newton in 1687 in the Mathematical Principles of Natural Philosophy. Newton's universal law of gravitation is expressed as follows:

Any two particles are attracted to each other by a force in the direction of the concentric line. The magnitude of this gravitational force is directly proportional to the product of their masses and inversely proportional to the square of their distance, independent of the chemical composition of the two objects and the type of medium in between.

According to the International System of Units, f is measured in Newtons (n), m1 and m2 are in kilograms (kg), r is measured in meters (m), and the constant g is approximately equal.

g = n·m kg (Newton square meters per square kilogram).

Due to the rotation of the earth, the objects on the earth move in a circular motion, and the centripetal force f = mr = mr cosa, f is provided by the gravitational force f, which is a component of f, cosa is the cosine value of the angle between the gravitational force f and the equatorial plane, and the other component f of f is the gravitational force on the object, i.e. f = mg.

It can be seen that the gravitational pull of the earth on the object is the reason why the object is subjected to gravity, but the gravitational force is not exactly equal to the gravitational force, which is because the object rotates with the earth and needs a part of the gravitational force to provide the centripetal force.

The force exerted on an object due to the attraction of the earth is called gravity. The object of gravity is the center of the earth. The direction of gravity is always straight downwards.

The gravitational force experienced by the object is proportional to the mass of the object, and the calculation formula is: g=mg, g is the proportionality factor, the gravitational force is about, and the gravitational force changes with the change of latitude, indicating that the gravitational force of an object with a mass of 1kg is. The point at which gravity acts on an object is called the center of gravity.

This concept only applies to the vicinity of the ground.

The combined effect of the gravitational force and the inertial force that gives weight to an object is called gravity.

As for the topic of how the gravitational pull of the earth is transmitted to the object, my personal opinion is that the way the gravitational force of the earth is transmitted to the object is reflected by the magnetic action of the magnetic field.

Why?

Because the terminal structure of all objects in nature is composed of atoms, and atoms are composed of atomic nuclei and many electrons moving around the periphery of the atomic nucleus, and the synchronous motion of electrons around all atoms of an object will naturally produce the magnetic field and magnetism of the object.

There are two forms of gravitational attraction on objects, one is the attraction of the Earth's geocentric magnetism; The second is traction within the reach of the Earth's magnetic field. First of all, let's talk about the magnetic attraction of the earth's geocentric, the earth's geocenter has a strong magnetic physical phenomenon, and magnetism has the physical properties of opposite-sex attraction and same-sex repulsion, on the one hand, it has a magnetic attraction to all objects on the earth's surface, which will cause objects to produce weight phenomena.

On the other hand, for objects from space orbiting close to the earth's orbit, due to the phenomenon of rotational motion on both sides, the earth's magnetic field and the magnetic field of space objects are both in a magnetic opposite state, and opposites attract each other. For example, at night, we can often see meteors in the sky, which is the attraction of the earth's geocentric magnetism, and the mutual attraction of large eating and small occurring for objects orbiting close to the earth in space.

In view of the rotation of the earth, it will jointly pull its magnetic field and circulate around the direction of its rotation, thus producing the physical phenomenon of circular traction. At the same time as this process, all the health materials in the space of the Earth Guardian will be affected by this circumferential traction and move in an orderly circular motion around the direction of the Earth's rotation.

It can be seen that the way in which the Earth's gravitational pull is transmitted to objects is reflected by the magnetic action of the Earth's magnetic field. I wonder if this is accurate?