If you could free fall to the center of the Earth, would your speed remain the same or would it increase?
435954
i'm assuming that you are ralking bout a hole being drilled right thru the earth and somebody falling into it...............you would accelerate and move towards the center and reach the opposite end of earth, at which point your velocity will reduce to zero and you will again move back to the cetre of earth and then onto the starting place.............in simple words you would execute Simple Harmonic Motion(SHM)
642685
Ummm.... relativity doesn't have anything to do with it.\n\nBoth objects, regardless of their mass, are pulled toward Earth by the exact same gravitational force, and therefor are accelerated in exactly the same way (9.8 m/s^2) Thus they fall at the same rate.
109780
As you move "downward" towards the center of the Earth, gravity will decrease. As you pass through the exact, physical center of Earth, gravity will be zero. As you move away from the center, gravity will begin to increase.\n\nYou can roughly compute the force of gravity with this formula --\n\ng = G*m/r^2\n\ng - gravitational force in Newtons\nG - gravitational constant (6.673^minus 11)\nm - mass of Earth\nr - distance from center of mass
343251
Yes the earth would move but not that anyone would notice.\n\nEvery time you push off from the earth, the earth moves \nat a velocity equity to -your_velocity* your_mass/earth_mass.\n\n6 billion people would be less than 600  tons while the earth is about 5,972,000,000,000,000,000,000 tons
346914
Yes, especially forward at a rate of 1 sec = 1 sec.\n\nI also believe that other rates are possible depending on velocity and proximity to sources of gravity.\n\nI also would like to believe that it can be reversed, but that's harder to swallow due to paradox effects.
473407
An object in motion remains in motion unless it is acted upon by an outside force.  Say you're traveling in a train going 200 miles an hour, jumping on a trampoline.  Before you jump, both you and the train are moving 200 miles an hour forward.  When you jump, you'll begin moving upward at about 5 mph, but you'll still be going 200 mph forward as well, just like the train.  When you come back down, you'll meet the trampoline exactly where you left, because you, the train, and the trampoline have all been moving forward at the exact same speed.  Here's another example:  The circumference of the earth is around 24,000 miles, and the earth completes one revolution per day.  That means that, in one day, you travel in a 24,000 mile circle, yet you don't feel that you are moving because everything else is moving at the exact same speed.
987225
if @ a constant speed, you have the same speed as the plane\nif you jump though, you ain't attached to the floor anymore to maintain the same speed, thus \ni say you land in same spot\nthere's no air resistance or friction if you jump in the air inside the airplane\nu should have the same speed continuously\n"an object in motion, will remain in motion unless acted upon by an outside force"
325003
You would have to overcome the spinning motion of the atmosphere.  See my answer to your "if the world stopped spinning" question.  So yes, if you could reach about 900 mph going west, you would be counteracting the spinning of the Earth and eventually be somewhere else "without moving".  Now about the Earth's orbit around the sun...
346050
You'll never get to the other side, first because if it was possible, you'd burn in the central core. But more importantly, the fact that you fall into the hole is because you're attracted by gravitation force, so you're attracted to the center of the Earth. The closer to the core, the stronger the attraction force. Therefore, if you reached to center of the Earth, you'd stay there and would not be able to continue your jouney to the other side, unless you had a power device that helped you get away from this force
794485
You are upside down... according to someone in Australia.\n\nThe Earth is a sphere and is constantly attracting you via gravity.  So no matter where you go it will always be pulling you towards the center.  As you travel around the globe "down" will always be toward the center of the Earth.
648259
depends if the gravity is the same, since gravity has the same effect on time as acceleration does. but it wouldn't be a noticeable amount on earth.
858875
First off, much of the interior of the earth is molten after you get about 30K down, so you couldn't really drill a hole through it. But for arguments sake, let's say you built a super-strong tube out of some nano-material and inserted it through the center of the Earth from pole to pole. Now you drop your stone.\n\nThe stone would fall towards the center of gravity, the center of the Earth. It would accelerate as it fell, so it would presumably fall past the center and head towards the South Pole. As it headed towards the South Pole, the gravitation pull would slow it down. Would it manage to to escape the Earth's gravity? No.\n\nConsider that the stone being at the top of the North Pole represents "potential kinetic energy". You could have generated energy from its fall much like a dam creates energy from falling water. Instead, it fell freely towards the center of the Earth, and all its potential kinetic energy has been turned into velocity. That velocity can't be enough to go any further than it fell (that is, out of the South Pole) because where would the excess energy come from?\n\nNow when the stone is at the center of the Earth, it has no potential kinetic energy. It can't fall anywhere, because every direction is up. All of its potential kinetic energy has been turned into velocity and so it should "fall up" the distance that it fell down. When it reaches the South Pole, it will have no velocity left, but it will have the same potential kinetic energy as when it started to fall. So you might expect it to fall from pole to pole indefinitely.\n\nHowever, if the tube is full of air, we have a problem. Falling objects normally have a "terminal velocity", which is the speed at which the air resistance stops the object from accelerating further. The air pressure at the center of the Earth would be enormous (air would probably be a liquid at these pressures and temperatures), as it would be subject to the weight of the air both north and south of the hole pulled in towards the center. The increasing density of air would slow the object as it fell to where it had little momentum as it approached the center. It might overshoot somewhat, but friction would continue to slow it until it was drawn to the center of gravity.\n\nNow if the tube contained a perfect vaccuum, the object should continue to fall from pole to pole indefinitely...except there's the problem that the stone would hit the sides of the hole due to the rotation of the Earth. See Foucault's Pendulum. This would slow it down, causing it again to settle at the center of the Earth.\n\nThere you have it. No need to drill through the center of the Earth now.
587307
Yes, you would be upside down.   You'd get lighter and lighter as you approached the centre of the Earth.   As you continued towards the opposite side, your weight would start increasing,you'd start to feel upside-down and you'd reach the other side feet-first.   If I tried this, I'd turn myself through 180 degrees when I reached the centre.   It would be a whole lot easier.
412208
it can either increase the speed of the fall by reducing the air resistance or decrease it by creating more air resistance. think parachute and missle.
339303
well if you forgot about the fact that the heat (the core is molten rock and iron) along with the pressure (the closer you get to the center of the earth the more pressure there is) would easily kill you no you would fall and get stuck in the center because a person can only gain so much momentum before they begin the slow down again and you wouldn't have enough to get out the other side
925295
Since anti-gravitation is still SF, the only way I can think of is to take a steep dive with an aeroplane. You won't be weightless in relation to the earth, but in relation to the plane it seems like so.\nAnother situation may appear when you actually could get to the center of the Earth. There are still gravitational forces, but you are pulled equally in every direction by them, so you would be floating.
604528
Gravity won't let you. You have to go into orbit first, and 1 mph will not do that. You have reach escape velocity to escape earth's gravity, which is 11.2 km/s.