What will happen?

Question

what will happen if imagine we could dig a tunnel from one side of the earth and came out through another and then drop a stone into it. Will it come out through the other side? What will be the result?

Answer 1

Ignoring the following things: the rotation of the earth, and the fact that the earth is not solid all the way through...

If you drilled a hole all the way through and dropped a stone in, it would accelerate until it got to the center of the earh, then it would start to decelerate. It would ALMOST make it to the other side. The reason it wouldn't make it all the way is because some of its kinetic energy was lost to friction with the air in the hole. After it got as far as it could go, it would start to come back, and it would travel even less distance before starting to "fall" again. Each time it would lose a little more energy until it eventually would come to rest at the center of the earth. And note that the stone wouldn't be resting ON anything, it would just be at rest, in "mid-air", if you like.

If you want to go one step further and ignore friction, the stone WOULD make it to the other side, but just barely. If no one were there to catch it, then it would just oscillate back and forth forever, from the point where you dropped it to its antipodal* counterpart.
This would make a good method of travel, no? Just hop in the hole, and in a little while you'd pop out the other side of the earth, as if you'd just teleported or something (of course this is a non- physical scenario).

*vocab:
antipodal points = opposite points on a sphere

Answer 2

It will oscillate from one open end to the other open and after a long long time come to rest at the centre of the mass of the earth.

From time to time this is a classic problem ask on many B.Sc math and sometimes B.Sc. Physics exam at Bombay university and other institute.

PS

The deepest we have penetrated is few miles, last attempt fail in in even shorter distance then the previous attempt.

It is possible and worth achieving, but would be prohibitive in expense. A success will mean a new system of travel, between two point on the surface of the earth, using gravity only for most part and some system to transfer on the run. We are doing this type of transferring in the space all the time.

Answer 3

Ah, the hole question. Well, assuming we are ignoring the fact that the heat and crushing pressure would make this all but impossible, the rock would fall past the center of the earth for some ways, then with gravity acting on it from the oposite direction, fall back. This would happen over and over until the rock reached a point where the gravity would be so little, it would float in midair. I've always wanted to try this myself.

P.S. Actually, it would float in a sea of molten iron, but from the question I get the feeling you're not a stickler for accuracy.

Answer 4

If we dig from the top earth side to down then the stone comes out.Otherwise it will stopped somewhere in the middle of the earth.

Answer 5

Pray to God constantly at the same time as attempting, as God enables people who help themselves particularly than people who're lazy. Lord Krisna mentioned in Bhagavad Gita, we could carry out our works and surrender the fruit of our action. So we could save attempting and locate excitement in doing our artwork, no count number if or no longer we get the needed consequence. we could constantly no longer lose desire. Do your terrific and circulate away something to God,it is going to all come precise some day or night.

Answer 6

definitley it will come to other side of earth.but we are not sure about how long it will take?or how it reaches?
but it will come to other end by making a motion which is effected by some forces.

Answer 7

you wouldnt be able to drill a hole through the molten in the earth, as your tools would just melt.

Answer 8

Not possible