a hole through earth dropping a ball in would do what asuming earth is soild?
366783
The ball would reach the other end and turn back and so forth i.e. it would oscillate. The whole motion is based on the gravitational force. Its a physics problem. check out a physics book chapter on gravitation.
524893
there is no dirt in a hole. the dirt that has not been removed would be considered a part of the diameter of the hole.
1110006
if you DIDN'T include the SCORCHING MAGMA and the EXTREME VELOCITIES EXHIBITED BY FALLING THROUGH THE EARTH and also the CHANCE THERE IS WATER ON THE OTHER SIDE THAT WOULD EMPTY INTO THE HOLE, you would go down easy, but then it would become increasingly hard to climb out of the hole once you are at the center. also, gravity will be stronger at the middle and close to it. here is a diagram. gravitational force is measured as 1 weakest and 4 second strongest, then () as the center. [ and ] are the crust\nweeeeeeeeeeeeeee    center of earth!!!!  \n[ 1       2        3           4             ()                 4        3        2        1 ]\n\nbasically, closer to the center of the earth, greater gravitational force. you could get crushed by the gravity in the center anyway and there would be not enough oxygen to breathe for the extension of the trip. revisiting the make a hole to china and maybe end up in a ocean idea, here is a link.\n\nhttp://www.digholes.com/\n\nthis is kind of cool. double click where you are digging from, then it will show where on earth you would end up. if you dug from china straight down, you would end up in south america. try it.
450269
Well if the ball is hollow then it will float. If the weight of the water displaced is greater than the weight of the object then it will float because the object is lighter then the area of water it is taking up.
201479
When you throw a ball in the air it gradually gets slower until it starts falling back towards the Earth.  The faster you throw it the higher it goes.\n\nImagine now if you throw the ball fast enough that the Earth's gravity will not be able to slow it down enough before it escapes into deep space (outside our solar system).\n\nThis speed is the escape speed or escape velocity.\n\n---------------------------------------------------------\n\nMore accurately when you through a ball in the air you give it a certain amount of kinetic energy, as it gets higher this kinetic energy is being converted into gravitational potential energy (gravitiational potential energy is greater the higher you are).  The escape velocity is the velocity at which it has enough kinetic energy that you would have to take it an infinite distance away from Earth before it was all converted into gravitational potential energy.
457303
Imagine a beach ball with two ladybugs on it, at opposite sides.  Hold your imaginary ball in front of you with one bug at the top and one at the bottom.  It does in fact appear that one bug is upside down to you.  Now hold the ball upside down.  You can't, because it is round, though the location of the bugs gives you an appearance of "upside down".  Taking the same application where Earth is now the beach ball and we are the ladybugs, gravity holds us to the Earth standing upright.  The apearance of "upside down" would occur if you could view a cut away, but you know now that you cannot turn the earth upside down in reality because of it's shape.
14021
The ball would bounce higher if the container kept a vacuum in it the entire time.  The first thing to understand is that there will not be pressure on top of the ball, there will be pretty much equal pressure around the ball from all sides; the air will spread evenly throught the container very rapidly.\n\nThis air will create drag, which will slow the descent of the ball and reduce the kinetic energy and momentum of the ball.  Drag and friction are called non-conservative forces, because when kinteic energy is lost to them, it is not transferred to another object, rather it is gone and not retrievable.  (It actually does get transferred, because no energy can truly be destroyed, but it is not retrieable.)\n\nSo what we have so far is a ball that is falling through dense air (greater pressure of a gas means a greater density of the gas), which is putting drag on the ball.  This means the ball does not fall as fast as it would in a vacuum, and the faster a rubber ball falls.  We then suck all the air out instantly, and the ball will bounce back up unrestricted by drag on its way up, but it would have bounced higher if it was not slwoed down by air during its fall and had a higher impact speed.
3001
That's an interesting question.  Very little would happen that you would notice at the edge.  The center of gravity for a sphere (like the Earth) is the geometric center of the shpere and at any point on the sphere, a straight line could pass from the center of the sphere, through your feet and through your head when you are standing erect.  Because the curvature of the Earth is hard to detect where you stand, you sense that you are standing perpendicular to the ground.\n\nThe center of gravity of an Earth-sized cube would also be the geometric center of the cube.  However a cube has six sides and the very center of each side would be the only six places on the cube where you could stand erect perpendicular to the surface.  At any other point, especially as you approach an edge or corner, a straight line should pass through the center of the cube, your feet and your head, but you would be standing erect at an angle to the surface.  Right on the edge, a straight line could pass throught the center of the cube, the edge, your feet and your head as you stand erect relative to gravity.  As you step over an edge, the slope of the angle would begin to tilt the opposite way as you leave the edge toward the center of the next side.\n\nThere is an interesting point that when the British performed the original land surveys of India near Mt. Everest, the results were in error because they neglected to account for the gravitational pull of the mountain that affected perpendicularity of their plumb bob.  This effect might also create an abberation near the edges and corners of your cube.  At any rate, you would stand erect parallel to any plumb bob that you held.
481150
the earth spins at 1500 mph.  If you take a ball and spin it extreemly fast you will find that the center of the ball will grow and the poles will flatten.  It is like driving a car very fast.  The higher up ion speed you go the lower to the ground it will become.  I has to do with Volocity.
512623
I will state this here, in yet another question: THERE IS NO SUCH THING AS CENTRFUGAL FORCE!! Look it up in a basic physics textbook like Giancoli or Serway. Or even do a google search. You have to understand what reference frame you're talking about. The fact that your body tends to want to move to the outside of the curve when your car goes around in a circle has nothing to do with anything other than the fact that your body wants to keep going along in a straight line (conservation of momentum), but the car gets in front of it at every turn (semi pun intended). What is actually happening is that the car is an accelerating reference frame.\n\nAs for the moon/earth question... imagine a man 6' tall throws a tennis ball horizonatally with respect to the earth's surface. The ball will go forward a certain distance (because of it's velocity tangential to the earth's surface) as it falls the ~6' to the ground (because gravity pulls it down). The faster he throws the ball (horizontally), the further it will go before it hits the ground. If he throws it fast enough then the amount that the ball travels forward and the amount that it drops towards the earth's surface can match the curvature of the earth, and the ball will orbit the planet (neglecting air resistance, as we physicists always do) and come around and bonk the thrower in the back of the head. The moon is just a much larger tennis ball, thrown by a much larger man.\n\nYour eqn. is correct, but it only describes the force acting upon the moon. It is not the equation of motion, which detirmines what actually happens to the moon. The equation of motion is:\n\nF = m * a  (F = force, m = mass of moon, a = acceleration of moon around earth)\n\nIn the case of the circular motion of the moon around the earth, "a" is defined by:\n\na = (v^2)/r (where v is the magnitude of the velocity of the moon and r is the center-to-center distance from the earth to the moon)\n\nPlugging one into the other you get:\n\nG * M * m/r^2 = m * (v^2)/r (where M is the earth's mass)\n--> G * M/r = v^2\n\nSo, as long as the tangential velocity, v = sqrt(G * M/r), the moon falls just enough towards the earth as it travels just enough tangentially second by second, that it continues to orbit around the earth. (Note: there is NO CENTRIFUGAL FORCE anywhere in any of these eqns.!!)
21030
Assuming you have a tunnel that goes through the earth, take aside the fact you would survive the temperatures and such at the center, assuming there's no resistance (vacumn like environment), you would fall into the hole... accelerate to terminal velocity...pass the center, and slowly decelerating, until you reach back a speed of 0, where you will be at the other end of the hole, whereapart the whole process would start all over again unless you grasp the edge :)\n\nConsidering that the fact there's air, you'll encounter resistence, meaning you will accelerate to the center, start slowing down, but fall short of reaching the other end, then you will fall to the center again, fall even shorter of your original jumping position, and you'll oscillate back and forth until you indeed get stuck in the center of the earth.
1043854
This is a cool question.  If you were able to tunnel through the Earth, and fall through, your speed would keep increasing until you reached the graviational center.  At that point, the net gravitational force is zero, because all of the forces cancel.  However, you wouldn't just stop because of your inertia.  You would go right through, but then you would begin to slow down, until you reached the other hole.  Depending on how high you started from the first hole, and lets say you jumped five feet above the hole, you would come to a complete stop five feet above the second hole.  Then you would fall back through and continue that cycle.  (Of course we aren't considering air resistance, which screws everything up! ;0)\n\nGuess how long it would take to make it to the other side of the Earth through that tunnel?  Approximately 42 minutes!  Not a bad way of traveling.\n\nThe other cool thing is, if you were to tunnel from say New York to Berlin, which means the tunnel isn't obviously through the middle of the Earth, it would still take you 42 minutes!
406527
b/c it's kinda dug into the ground...
61784
That's an interesting qts. I assume that you wish to invlove pure physics in this qts. Forget all the heat at the core of the earth and also air resistance.\nConsider pure gravitation theory.\n\nIf say the fellow who fell in the hole has mass m\n\nThen force of gravity exerted by the earth is :\n\n  F = GMm/(r*r) ..... Where G - universal gravitation constant\n\n                            M - Mass of the earth\n                            r - distance between earth and body of mass m\n\n          acceleration due to gravity\n            = (1-h/R)g   .... where h is distance of body beneath the earth's surface and g is acceleration due to gravity at the surface of the earth.\n\nSo as the body comes closer to the core of the earth, h tends to R.\nSo the acceleration of the body goes on decreasing very much. So, body may not actually hover, since his velocity will be constant the instant it is at the core.
338480
That is a good & interesting question.\n\nIn all logical aspects, this should occur due to the fact that everything in nature trys to balance out. This includes things like air pressure; it travels from high to low areas of pressure. In the same manner, everything that is uphill or of higher elevation trys to balance w/ those that are of lower elevation; hence erosion & drainage basins in general.\n\nIn order for this to occur, a lot of sediment would have to be washed into the drainage basin's streams & rivers. That would take a very long time.\n\nAlthough I think the answer here has to do with the fact that the earth's crust rebounds in a process called isostatic adjustment.\n\nWhen material is removed from the crust to another location, weight is taken off of an area. The crust will readjust to the former height by rising slightly.\n\nIt's just like placing several blocks of wood in a container of water. As you take off one of the blocks, the rest of them will rise in response to the reduced load.\n\nThats my answer & I'm sticking to it.\n\n:)
405941
as I think u need to know about the relative velocity. If the Earth is in constant motion so all the stuff on the Earth are all in constant motion with speed equal to that of the earth.  \nkey point is that the ball move with the earth.\nWhile the ball placed on a table will not move unless u apply a force to it.(The 1st law of motion) When u move the table forward the table will move forward but the ball would remain in its place if there would not be any friction present between the ball and table.
184255
The best thing would be a copper wire attached to a metal bar into the earth. Other choice would be the gorund wire in an electrical outlet (careful not to hit live wires) or to a rubber mat on a concrete floor