Here's something you never thought of. What if you fell into a hole in the earth that was pretty wide and went all the way through the earth. What effect would gravity have on you at the centre of the earth. The answer is no effect at all. You would go shooting past the middle at about two hundred miles an hour and then pretty soon you would come shooting back the other way at about the same speed and back and forth awhile and then stop in the middle. You better hope somebody has a rope a few hundred miles long to rescue you.
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