If a hole was cut straight through the earth to the opposite side and you jumped

Of course in this example, there is 'breathable air' and no 'lava core' for the sake of limiting the question only to the question of gravity. If you jumped in this hole, what would happen? Would you fall to the center slowing down as you reached? Fall past it and then fall back up eventually remaining in the center? Fall past it from momentum and go to the other side? If you stayed in the center would you IMPLODE or EXPLODE? You could implode because gravity is pushing in both directions. But you could also explode because gravity is pulling in both directions. Would it cancel and you would just sit there and float until you died of starvation?

We would all die, because there's a mother****ing hole in the planet.Theokhoth

Scruffy agrees.

The real question is this? Why would I jump?GrandJury

If there's no core, how is gravity attracting me?Genetic_Code

Once you hit the center, you would be crushed by gravity.

You'd bounce back and forth, from end to end forever.

Once you hit the center, you would be crushed by gravity.

TSNAKE617

At the center you would meet up with the Smurfs and live happily ever afterGolevka

You'd bounce back and forth, from end to end forever.

magnax1

[QUOTE="TSNAKE617"]

Once you hit the center, you would be crushed by gravity.

Saturos3091

I don't think so, because its a constant force.

[QUOTE="GrandJury"]The real question is this? Why would I jump?Perd1t1on

You'd bounce back and forth, from end to end forever.

We would all be torn apart lol.

[QUOTE="xaos"][QUOTE="magnax1"]

You'd bounce back and forth, from end to end forever.

Perd1t1on

No, but it'd be a constant force, so the friction wouldn't slow you down. Its like being dragged on the ground, the ground slows you but as long as you're being pulled you'd keep going.

You would probably hit the middle, decelerate rapidly and start being stretched to death by the fact that gravity by that point will be an omnidirectional pulling force on you.

[QUOTE="Perd1t1on"][QUOTE="xaos"] Except that you'd fall a bit less on each trip through due to friction lossesmagnax1

No, but it'd be a constant force, so the friction wouldn't slow you down. Its like being dragged on the ground, the ground slows you but as long as you're being pulled you'd keep going.

[QUOTE="magnax1"]

[QUOTE="Perd1t1on"] given that there is air resistance. wouldn't it be a vacuum in there?Perd1t1on

No, but it'd be a constant force, so the friction wouldn't slow you down. Its like being dragged on the ground, the ground slows you but as long as you're being pulled you'd keep going.

But you would still have momentum. I actually looked this up a while ago, and maybe the sites were wrong, but it said you'd bounce back and forth forever.

[QUOTE="Perd1t1on"][QUOTE="magnax1"]

No, but it'd be a constant force, so the friction wouldn't slow you down. Its like being dragged on the ground, the ground slows you but as long as you're being pulled you'd keep going.

But you would still have momentum. I actually looked this up a while ago, and maybe the sites were wrong, but it said you'd bounce back and forth forever.

[QUOTE="magnax1"]

[QUOTE="Perd1t1on"] you mean the force being gravity from the opposite direction? F=ma, 0=m(9.8)+m(-9.8). The thing is though, gravity changes with altitude. It gets smaller as you get higher, so I would assume it would get larger towards the center but still be equal so the net force on you in the center would still be 0 and therefore you would just sit there. Perd1t1on

But you would still have momentum. I actually looked this up a while ago, and maybe the sites were wrong, but it said you'd bounce back and forth forever.

Yeah, thats what it said. You'd bounce the full length back and forth forever. Maybe it was wrong, look it up again if you want.

You would reach 120 mph, slow down as you got closer, go past, fall back down, go past less, fall back down, go pass less...until eventually you stop.

yeah, i think you would just be swinging back and forth between the different sides. if you have ever played Portal? i think it is somewhat like that game when you put 2 portals on the floor. you jump in and you come out the other but fall back, and so on.

No, it slows down over time because of air resistance and friction. If you did a pendulum in a frictionless vacuum, then it would just keep going and never stop.

As for the Earth, I'd say that you would go like 90% of the way to the other side. You couldn't make it all the way because of air resistance and such.

[QUOTE="Perd1t1on"][QUOTE="xaos"][QUOTE="magnax1"]

You'd bounce back and forth, from end to end forever.

JIT93

Lol. First off a vacuum is impossible. Secondly, we would die if we went in it, because there would be no air...

At the center of the earth, assuming there is gravity, you will simply be tossed up and down. As you pass the core, you will be pulled upwards back towards the core. Then as you pass the core again, you will deaccelerate and then head downwards towards the core again. This pattern will constantly continue. The direction of the force of gravity will be constantly changing, therefore your position-time graph would probably look similar to that of a sine graph.

my head broke fromstupidity. why would i jump anyway?

At the center of the earth, assuming there is gravity, you will simply be tossed up and down. As you pass the core, you will be pulled upwards back towards the core. Then as you pass the core again, you will deaccelerate and then head downwards towards the core again. This pattern will constantly continue. The direction of the force of gravity will be constantly changing, therefore your position-time graph would probably look similar to that of a sine graph.

argetlam00

If there was no air resistance, and the other side was at the same elevation, you would arrive back at the other side and that is the point at which you'd start to be pulled back towards the original side again.

Well, I guess you'd suffer from the air pressure similar to what would happen if you went far under the sea.

Wind resistance would slow you down somewhat and eventually you would hit terminal velocity. If there was no air to then you would make it to the other side (dead, obviously) and you would start falling back in the other direction once you got there. Gravity would not be "pushing in both directions." That doesn't make sense. There will be a net gravitational force that pulls you in one direction. In the center, if the Earth was perfectly symmetrical, there would be zero net gravitational force on you. Regardless of where you are, there is no reason that gravity would pull part of your body in one direction and part in another, except for some immeasurably small difference. You are too small relative to the Earth for that small differential to matter. The reason you "feel" a force is when it acts on part of your body instead of being distributed over your whole volume equally. You don't really feel gravity. You feel the forces that are opposing the direction of gravity because they are pushing on part of the surface of your body rather than being distributed over the the entire volume of your body.

What needs to be considered when dealing with gravity is that it acts over every particle in your body. If part of your body is pulled in one direction then all of it is. There is no "pulling apart" or "pushing together" because every single part of you is being accelerated in essentially much the same direction. If that wasn't the case, you wouldn't need to go into the center of the Earth. Most of the mass of the Earth isn't directly below you in the first place.

If there's no core, how is gravity attracting me?Genetic_Code

Thats not how gravity works its based on mass, even if the core was displaced to around the mantle, the mass wouldn't change much.. Now what would change is our planets magnetic field would be disrupted and we would all die.

[QUOTE="argetlam00"]

At the center of the earth, assuming there is gravity, you will simply be tossed up and down. As you pass the core, you will be pulled upwards back towards the core. Then as you pass the core again, you will deaccelerate and then head downwards towards the core again. This pattern will constantly continue. The direction of the force of gravity will be constantly changing, therefore your position-time graph would probably look similar to that of a sine graph.

markop2003

ACtually there is a force of gravity buddy. It stems from the basic equation of newton second law F=ma, changed to F=mg....This is commonly reffered to the force of gravity.

If there was no air resistance, and the other side was at the same elevation, you would arrive back at the other side and that is the point at which you'd start to be pulled back towards the original side again.

Well, I guess you'd suffer from the air pressure similar to what would happen if you went far under the sea.

Wind resistance would slow you down once you hit terminal velocity. If there was no air then you would make it to the other side (dead) and you would start falling back in the other direction once you got there. Gravity would not be "pushing in both directions." That doesn't make sense. There will be a net gravitational force that pulls you in one direction. In the center, if the Earth was perfectly symmetrical, there would be zero net gravitational force on you. Regardless of where you are, there is no reason that gravity would pull part of your body in one direction and part in another (except for some immeasurably small difference). You are too small relative to the Earth for that small differential to matter. The reason you "feel" a force is when it acts on part of your body instead of being distributed over your whole volume equally. You don't really feel gravity. You feel the forces that are opposing the direction of gravity because they are pushing on part of the surface of your body rather than being distributed over the the entire volume of your body.

What needs to be considered when dealing with gravity is that it acts over every particle in your body. If part of your body is pulled in one direction then all of it is. There is no "pulling apart" or "pushing together" because every single part of you is being accelerated in pretty much the same direction. If that wasn't the case, you wouldn't need to go into the center of the Earth. Most of the mass of the Earth isn't directly below you in the first place.

StopThePresses

Air pressure doesn't work exactly that way.. The reason why air pressure is much higher under water.. IS because the amount of wieght the sea is pressing down on you.. Not enough air pressure and your vehicle implodes..

I have actually wondered about this on more than one occasion. I imagine you would float up and down eventually coming to a stop in the center.Tauruslink

Well with air friction that certainly is a possibility and probably true.

I had a mental image of what could happen. But I was also thinking, jump on a trampoline and you go up right? The more force you put into your jump the higher you go. Well if you were to jump through a hole in the ground and come out the other side, wouldn't you just keep going upward? I mean gravity may pitch in after a few thousand feet into the sky on the other end, but you would probably gather enough speed to make it into space.

We would all be torn apart lol.

thespywholied

Ask......

mmm, sir, u win the internet for today

I had a mental image of what could happen. But I was also thinking, jump on a trampoline and you go up right? The more force you put into your jump the higher you go. Well if you were to jump through a hole in the ground and come out the other side, wouldn't you just keep going upward? I mean gravity may pitch in after a few thousand feet into the sky on the other end, but you would probably gather enough speed to make it into space.

momo372

If like you said there was no air resistance, there would be no air pressure right? since air pressure (and water pressure) is the weight of the particles pushing down on you.Perd1t1on

Air pressure comes at you from every direction though. It doesn't just push down on you. Gravity increases air pressure because gases are pulled downward and thus they are more densely packed. Much of the pressure comes from the "random" bouncing around of gas particles, in various directions. The more dense the gas is, the more the molecules are going to be bouncing off of each other, and thus bouncing off of other surfaces. This isn't particularly relevant if there is no air, of course. :P