I have a question about special relativity, completely dizzy, physics masters help!

The problem is with your rigid levers.

At the speed of light, the field around the molecule (gravitational field, electromagnetic field, etc.) begins to spread the perturbation outward (in the form of waves), and all other molecules in the molecular field begin to be perturbed accordingly, and thus diffuse the perturbation at the speed of light.

From a macroscopic point of view, the information of "force point force" spreads outward at the speed of light, and every molecule in the lever (or understood as a particle) begins to be accelerated by the moment action from the power arm, according to the theory of relativity, the mass of each particle increases rapidly, then, on the resistance arm, from the particle point outward, the mass is getting larger and larger, but the torque transmitted to it does not change, so the acceleration is getting smaller and smaller.

As a result, the rod bends in an arc, and the end of the resistance arm is close to but not to the speed of light.

Now that the theory of relativity is discussed, many of the classical theories of classical mechanics are no longer applicable, so you know that.

So, the speed of the power point is moving, and the resistance point is moving at a speed of 2c, this uses the formula of classical mechanics, and in the case of the speed of light, this formula may not be applicable for a long time, and when moving at high speed (close to the speed of light), the power arm is still 20 times that of the resistance arm? These are uncertain and need to be examined in depth with knowledge of the theory of relativity.

The theory of relativity is so profound that it is difficult to understand with ordinary thinking.

Hehe, the mistake is that the premise of the principle of leverage, the lever is rigid, and under the conditions described in your question, the lever is still not rigid, and it is unknowable. That is, whether this event can happen or not, it is not known.

yes, the theory of relativity also confused me.

There are several problems in your hypothetical experiment: 1 It seems that the resistance arm should be 20 times larger than the power arm; 2. It is assumed that the lever is always a rigid body, and this assumption is not necessarily true in high-speed motion; 3 The power is large enough, according to the theory of relativity, the higher the speed, the greater the energy required, so that when approaching the speed of light, the energy needs to be infinite; 4 If the speed of light is indeed made, it proves that Einstein did not consider it fully and needs to be explained by universal relativity.

Introduction to Einstein's Theory of Relativity.

After the special theory of relativity satisfactorily solved many problems in physics, Einstein was still not satisfied. He also saw the limitations of the new theory. Because the principle of relativity of the special theory of relativity is still limited to the inertial frame of relative uniform motion.

The denial of the stationary aether as a special coordinate system is a big step forward, but why is the inertial frame still special and superior to other coordinate systems in physics? Einstein was acutely aware of this as an "epistemological flaw". Therefore, despite the advice of his friends, he still went deep alone, engaged in the study of the theory of relativity alone, and continued to search for a more general and harmonious theory of physics.

Special Relativity: Can It Reveal the Mysteries of Space and Time? One minute will take you to understand the special theory of relativity.

Actually, it's like this:

1.It is not easy for us to clarify the truth of things between the two of us, so we might as well assume that the triplets A, B, and C, assuming that B moves with the Earth on Earth (which is stationary relative to the Earth), and that A and C both start from the same point as B, but they both move in opposite directions and at the same time move at the speed of light (sub-light) relative to B, and, in order to prevent some so-called experts and scholars from deliberately confusing the concept, we have to assume that the rockets on which the brothers A and C are riding are double-headed ( That is, there are thrusters at both ends, so that the so-called U-turn problem is avoided), and we require that the faces of A and C always face B, and wait until A and C have been running for a year, and then start returning, and it will take a year to return (both A and C are moving in opposite directions at sub-light speed relative to B).

2.For the sake of simplification, only the following scenario will be discussed: the rocket accelerates to sub-light speed for a very short time, decelerates to zero in a very short time after flying for one year, and when it returns, the rocket accelerates to sub-light speed in a very short time, and when it approaches the Earth, it decelerates to meet the Earth in a very short time.

The purpose of this is to omit the effects of acceleration and deceleration.

3.According to the theory of the limit of the speed of light (at least in the physics of our world, it cannot be surpassed at present, not to discuss those sensational "special cases"), in fact, the speed of A relative to C is also the speed of light.

4.Let's discuss: What do A, B, and C see?

5.First of all, what is the state of A seeing C? For A, C is always in mirror motion with himself, and no matter what A does to himself, C is in the opposite direction and at the same speed as himself, so A will see C move away from him at the speed of light, and a year later C will approach him at the speed of light, and finally meet on Earth;

Then, what state does B see A and C? b will see his brother and brother move away from him at the same speed and in reverse, and a year later, they will approach him at the speed of light at the same time, and finally (at the end of the second year) the three brothers will meet on earth.

Finally, what state does C see A? C sees A and A sees C in exactly the same way.

Note: In order to prevent some people from messing around, we assume that the photon rocket is not powered by flame-like gas, and none of the three will be blinded.

According to the principle of relativity of motion, as well as the principle of special relativity: when the three brothers meet on Earth, A will feel that C has been moving at the speed of light relative to himself for two years, so C is younger than A; C will feel that A has been moving at the speed of light relative to himself for two years, so A is younger than C; B will feel that both A and C have been moving at the speed of light relative to themselves for two years, so both A and C are younger than B.

The contradiction is so obvious: Brothers A, B, and C will insist that all three brothers except themselves are younger than themselves, and that they are the oldest.

A very obvious conclusion can be drawn from the above: the special theory of relativity does not stand up to scrutiny, don't talk to us about world lines, non-Euclidean geometry, or whatever, that's called! When you can't talk about others, you will sell some blind concepts that everyone can't understand, so you can make a fool of yourself!

Twin paradoxes, a problem that every beginner in relativity has to encounter.

Copy a paragraph to make up the word count.

In October 1905, the German journal "Annals of Physics" published an article "On the Electrodynamics of Moving Bodies", which announced the advent of the special relativity hypothesis. It is this seemingly ordinary ** that establishes a completely new concept of time and space and challenges the obviously simple concept of simultaneity. We know that Einstein's special theory of relativity can be concluded that there is a time dilation effect on moving objects.

At the Bologne Philosophical Congress in April 1911, the French physicist P. Langevin used the twin experiment to question the time dilation effect of special relativity, envisioning a pair of twins, one staying on Earth and the other traveling to space on a rocket. Flying at nearly the speed of light, one of the twins who traveled in space was only two years old when he returned to Earth, and his brother was long dead because 200 years had passed on Earth.

This is the famous twin paradox.

The theory of relativity is not something that can be explained by common sense and classical macroscopic physics, it is beyond our common sense or understanding.

At least a few hundred years.

Brother, this question, I read that the theory of relativity is also true and not, and it is theoretically valid, but in fact I can't understand it.

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