Centre of the Earth. Question...
 

If it were possible to create a vehicle that could travel to the centre of the Earth, what effect would gravity have on an object. Would it be weightless? Does anyone know?

I believe the theory is quit the opposite. The closer to the center of the earth you get, the stronger the gravitational pull. If this is true, then at the center of the earth, I think the vehicle would emplode on itself.

The gravitational force between two objects is relative to the distance of their centres, and if the distance is zero, there is no force.. So, it would be weightless. (I think)

I'll confirm the above post. I'm in a intro physics class right now and we recently talked about it. the closer you get, the higher the gravity, but once at the center, you would be weightless (and pretty hot too ;) )

Pretty hot as far as looks are concerned?
or pretty hot as far as temperature is concerned?

You would have to be at the center but who's to say how big the center is? pin size? basketball size? You have all the force pushing you toward the center. If the vessel wasn't perfectly round it would be made that way by the force of gravity.

ok I was talking out of my ass there, someone care to explain to me what determines the center of gravity and and how you plan to stay in that center and not be squashed?

Well since the gravity would be most intense closest to the center, would it not put you into the center itself? You'd be so screwed... ahh, the center... lovely, warm and weightless (let's suppose), but an effort to move away from center in any direction would be met with crushing weight/resistance.
Oh my god, now who's talking out their ass. Never mind, skip on to the next post. Ahem.

I saw this acticle in the National Post today.

<b>Scientist floats $10B proposal to probe core</b>
http://www.nationalpost.com/search/s...F-653DCCE2990A

i don't know about the gravitational aspects surrounding that "point" at the center of the earth's core, but i do ponder which way it will point: left, right, up, down, in, out, north, south, over, under...

Gravitational force between two objects is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them. At the centre of the Earth, you are surrounded by equal amount of masses on all sides, so in fact, the gravitational forces being exerted on your body would all cancel each other out, making you effectively weightless. (I think...)

There would absolutely positively be no 'felt' gravity acting on something at the center of the earth. There would however be mind boggling pressures and extreme temperatures.

For a potential (if not feasible) way to actually get something to the center of the earth, check out:
http://news.bbc.co.uk/1/hi/sci/tech/3021255.stm
Really, it's interesting.

yeah, what memalvada said, the vehicle would be weightless

Well, if the created vehicle looks like a Camaro, nothing else matters. Vrroomm.