26 Mar '15 15:14

Through a theoretical hole drilled all the way through the center of the Earth and back to the other surface on the opposite side of the world?

I have this piece saying the regular answer is 42 seconds but nay nay, should be 38 seconds. I did the numbers and found if you had a constant acceleration of 1 G, the time it takes to get to 6,371,000 meters (radius of Earth) is equal to 19 minutes and therefore times 2 or 38 minutes to get from surface to surface.

http://phys.org/news/2015-03-fall-hole-earth.html

I don't see how EITHER number is correct. If I assign a value of half of 9.8 M/S^2 or 4.9, it comes out at 26 minutes to get to one R of Earth, X 2 of 52 minutes surface to surface.

So what is up with all that?

I have this piece saying the regular answer is 42 seconds but nay nay, should be 38 seconds. I did the numbers and found if you had a constant acceleration of 1 G, the time it takes to get to 6,371,000 meters (radius of Earth) is equal to 19 minutes and therefore times 2 or 38 minutes to get from surface to surface.

http://phys.org/news/2015-03-fall-hole-earth.html

I don't see how EITHER number is correct. If I assign a value of half of 9.8 M/S^2 or 4.9, it comes out at 26 minutes to get to one R of Earth, X 2 of 52 minutes surface to surface.

So what is up with all that?