What is a freefall paradox and what is a freefall movement?

The paradox of free fall is Galileo's thinking that the idea of free fall is mainly used to overturn Aristotle's idea that the heavier the heavier, the faster the fall, specifically like this, if the heavier the object falls, then now choose two objects, one heavy and one clear, when they fall from a high place, of course, the heavy one falls fast, and the light one falls slowly, if these two objects are tied together, and the weight of the rope is ignored, then the two objects tied together fall from a high place, whether the object with specific gravity is faster, or the object with specific gravity is slow, because two objects tied together to form a whole, must be heavier than the heavier object, so he should fall faster than the heavier object, but consider the two objects tied together separately, the light object is slow, the heavy object is fast, and the light object will definitely pull the heavy object is their overall velocity is less than that of the heavy object, so that two opposite conclusions are drawn from the same event, thus negating Aristotle's theory, which is Galileo's free fall paradox.

Paradox: A paradox is a paradox that appears to be a mistake, but is not. The twin paradox is one of the most well-known paradoxes in special relativity.

Because according to the special theory of relativity, time in a moving object slows down, and when the motion reaches the speed of light, time stops. The twin paradox goes something like this: if there are twin brothers, one of whom is moving at close to the speed of light for a while and then returns, he will look younger than his non-moving brother.

But in fact, from a completely relative point of view, when this person is exercising, his brother is doing the same exercise relative to him, so which one is older? Or is it just as old? I found that this was not a paradox, but a real error that could not be explained by the theory of relativity.

Pardox - Murder of the father is paradox.

In 1949, the famous philosopher K. Gödel returned to history based on Einstein's theory of general relativity, and it was permissible to travel. But he also points out that there are some absurdities in between, such as: Is it possible for someone to go back to the time before he was born, kill his grandfather, and then go back to his old time?

Since his grandfather was dead before he was born, how could he have existed? Therefore, because of the existence of this paradox, scientists put forward a view of "parallel time and space", and this view is basically recognized by the scientific community, that is, time and space are not the only existence, but there are countless parallel existences of time and space, and they cannot be related to each other in general.

Each space-time evolves according to its own laws and sequences.

It is also said that it is.

If each space-time exists in parallel, then the people who exist in that space-time do not necessarily exist in the other. In other words, you can't recruit your grandfather in another time and space, let alone kill him, since everything is very different, and the development and evolution are also different, and generally cannot be connected, nor can it affect our own time and space, then it can't be regarded as a return to the past at all. At most, even if it is a trip to another planet or a country, how can it be called a return to history.

The freefall paradox is a very esoteric question, and I don't know what level of physics you have. I can't explain it to you.,If you're interested, just look at the following **.,If you don't understand it, forget it.。

It's the old people who thought that the mass of an object was proportional to the speed at which it falls.

The great scientist Galileo Galilei came up with a hypothesis that easily shattered this ridiculous theory, and everyone who listened to it laughed at it, so it was called the free-fall fallacy.

The assumption is that if the mass of the object falls fast, then now, if two iron balls with different masses are bolted together, then the mass of the new whole should be greater than that of any one iron ball, so the falling speed should be the fastest, but the problem is that the ball with the mass will fall faster than the ball with the small mass, and then the small ball will equal the hind leg of the iron ball, so according to this explanation, the overall falling speed should be slower than the speed at which the big ball falls alone It falls faster than the iron ball on its own, which contradicts the above assumption, so the initial conclusion is completely wrong.

To put it bluntly, free fall is a special expression of gravity.

Free fall is a linear motion with uniform acceleration in the vertical direction with a constant horizontal velocity and a straight line with an acceleration of g.

Time The acceleration of gravity g has h=1 2gt 2

The height of the tower is equal to h+h1

An object that falls without any resistance and only under the action of gravity is called "free fall". Such as an object that begins to fall from a resting state under the gravitational pull of the earth. The sky above the Earth's surface can be seen as a constant gravitational field.

Without taking into account atmospheric drag, the free fall motion in this region is a uniformly accelerated linear motion. Its acceleration is constant equal to the acceleration g due to gravity. Although the gravitational force of the Earth is inversely proportional to the square of the distance from the object to the center of the Earth, the radius of the Earth is much larger than the distance traveled by the free fall, so the gravitational force can be regarded as constant near the ground, and the acceleration of the free fall is an immutable constant.

It is a uniformly accelerated linear motion with zero muzzle velocity.

The free-fall motion is a uniformly accelerated linear motion with an initial velocity of 0.

An object that falls without any resistance and only under the action of gravity is called "free fall".

It is to ignore all kinds of resistance and release a thing from a high place without initial velocity, and this falling process is free fall.

The free-fall motion is equivalent to the uniform acceleration of the object with an initial velocity of 0, so the acceleration is positive!

If the end velocity is 0 and the acceleration is negative when the object is evenly decelerated when it is thrown upwards and reaches a certain point, you can use reverse thinking to calculate and assume that the object is in free fall with an initial velocity of 0! This makes calculations easier.

Adopt or not?

The g of a free fall is only a positive number.

Negative is the acceleration of the vertical upward throw.

What is the concept of freefall motion.

It depends on what questions you ask, if you ask about the time of landing and the speed of landing, they are all determined by the height (in the absence of resistance), if you ask about the formation of free fall, which is mainly due to the attraction of the earth.

The "falling" of free fall, as the name suggests, refers to the falling of the object from a high altitude, the key is the word "free", which means: first, the object is stationary when it begins to fall, that is, the initial velocity is 0, if the object is given an initial velocity falling vertically, it cannot be regarded as free fall, and second, the object is no longer subjected to any other force (such as air resistance) in addition to gravity in the process of falling.

Satisfying the first two, the third can be deduced naturally.

Just gravity! There can be an initial velocity! If it is only affected by gravity, it must be a uniform acceleration linear motion.

Hawking said he concluded through calculations that once a black hole is formed, it begins to radiate energy outward, but this radiation does not contain "information" about the matter inside the black hole. Eventually, the black hole will disappear due to the loss of mass, and the information inside the black hole will not be lost, which is the so-called "black hole paradox".