What would happen if you hit a passage through the earth and fall in from one end Thank you

Physics questions? I guess I think it's about gravitational acceleration.

Because the closer you get to the center of the earth, the acceleration due to gravity increases.

Of course, as a physics problem, it should be ideal, that is, the distance between the two ends of the channel and the center of the earth should be the same, so if the initial velocity is zero, the motion of the object is to first accelerate without increasing the acceleration, and then do the deceleration motion with decreasing acceleration until the velocity decreases to zero when it reaches the other end of the channel, and then do the same motion in reverse. In the end, it can be said that there is a constant oscillatory movement in this channel.

I remember seeing this when I was studying physics.

Move back and forth N times and stop at the center of the earth.

Assuming that the channel is divided into two ends, A and B, and the middle point is the center of the earth C, other external forces are ignored and not counted, only the gravitational force and inertial gravity are considered, the object falls from the end of the channel A, and falls to the center of the earth due to gravity, but due to the inertial gravity, the object will rush through the center of the earth C position to reach the B section of the channel, but because the channel B also has gravity point C, and the gravity will neutralize part of the inertial gravity, the object will run a certain distance towards the B end and then move towards point C, and so on, and finally stop at point C. (Don't hit me with eggs and bricks, I don't understand either).

All of the above makes sense.

But do you think, what energy does the object have before it falls into this hole?

The kinetic energy is 0 and there is also gravitational potential energy.

Well, since the ideal situation is in mind, the object is in a never-ending motion between one end of the passage and the other, after all, without considering the friction and the influence of the earth's motion and geothermal heat.

But then again, what if not the ideal situation?

1.Burned into a gaseous state when near the center of the earth (makes sense).

2.Because of the super high speed, it is rubbed into a gaseous state by the air (the radius of the earth is 6400km, if the gravitational acceleration is calculated, the speed will not be very fast, but the closer the gravity is to the center of the earth, the faster the acceleration But what kind of speed is accelerated? It's really hard to say, because the surface behind the falling object also has a gravitational pull.

Requires a very awesome computer).

3.If the object is very heat-resistant and very abrasion-resistant, i.e. it does not take into account being burned into gas or friction-inspired, then the object ends up at the center of the earth.

There are so many hypothetical scenarios that it's hard to think about them all... Forgive me.

I can't get there! You'll be burned to ashes by the heat of the Earth's center as you fall!

You'll fall from the Eastern Hemisphere to the Western Hemisphere, and then from the Western Hemisphere back to the Eastern Hemisphere, and so on and forth

You'll be in another place!

You're going to die of old age on the way.

I won't die of old age, I don't have time to die of old age, I'll die of thirst and starvation.

I guess it's back to the middle 1 or 3.

Just consider the air friction and people are burned into gas!!

Regardless of resistance, the Earth is considered as a perfectly uniform sphere that theoretically moves repeatedly from one end to the other and back again from the other in the same way. However, because the net force applied to people at different positions in the interior of the earth is not the gravitational force of the earth on man (from the point of view of calculus, the gravitational force of each prescription substance on man is the same when it is at the center of the earth, that is, the force of the earth on man is 0 at the center of the earth). Away from the center of the earth, a similar effect occurs, but the resultant force is not 0).

Therefore, please be careful not to use the center of the earth as the force object of gravity to calculate the gravitational force on people. The gravitational force formula cannot be used directly here due to the different forces under it.

But even if the resultant force is calculated by taking the mass point of the earth as the force object and the distance to the center of the earth as the radius, the conclusion is that it is not a simple harmonic motion, because the "restoring force" experienced by man is proportional to the square of the distance, not to the distance.

As for whether it is a simple harmonic motion, it is not very clear, but such a motion is periodic, but after reaching the center of the earth, it will not stop immediately because of the inertia, and will continue to move forward, and after passing through the center of the earth (equilibrium position), it will be subjected to a force opposite to the direction of velocity, and the acceleration change will be decelerated. (weightless during the fall, overweight after passing through the center of the earth).

The regeneration force is directed towards the center of the earth.

The magnitude of the force is proportional to the magnitude of the displacement from the equilibrium position.

Gravitational attraction will stop when it reaches the center.

It depends on how fast you travel......

The Earth's equator is about 12,756 kilometers in diameter.

Walking around the clock at a speed of meters and seconds takes about 2,362 hours, that is, about one day, and it is estimated that it will take at least one year if you want to rest, sleep and eat.

It takes about an hour to fly non-stop in a high-speed plane at a speed of 1,000 kilometers per hour (in fact, most planes are below this speed), and all kinds of circumstances are counted, at most about 1 day.

Realistically, of course it's impossible, because there's resistance and geothermal heat (think of the magma).

Even ignoring air resistance and geothermal heat is not okay.

You throw the object down from one end of the hole, by gravity, there is an acceleration, the speed will be greater and larger, reaching the center of the earth is the maximum velocity, and then it is still affected by gravity (at this time the reverse effect), but the acceleration becomes "deceleration", the speed keeps decreasing, the exit velocity of the hole at the other end is just zero, and then the fall accelerates, decelerates back to this end of the velocity is zero, in the fall, accelerates and decelerates, and so on and so on and so on...

Therefore, it will not penetrate from the other end, and it will not be able to transcend the constraints of the earth's gravity.

It's okay to ignore air resistance and geothermal heat.

Leaving an object down is at first like falling into a well, and the speed of descent gradually increases, but after passing through the center of the earth, it now becomes not falling but rising. And the speed of the rise is not as fast as the fall, and at the exit, the speed becomes zero, and the object stops moving.

No, the object ends up moving back and forth in the center of the earth, forever and again, and it suffers.