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How Long Would It Take To Fall From One Side Of Earth To The Other?05:37
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How long would it take to fall through the Earth? Alex Klotz's new calculation is four minutes shorter than previous accepted answer. (NASA/Goddard Space Flight Center Scientific Visualization Studio)
How long would it take to fall through the Earth? Alex Klotz's new calculation is four minutes shorter than previous accepted answer. (NASA/Goddard Space Flight Center Scientific Visualization Studio)
This article is more than 6 years old.

The question is often posed to physics students who have always given answers under the assumption that Earth has uniform mass. But now, Alex Klotz, a McGill University grad student, has come up with a new calculation that challenges this concept.

His findings were published in the American Journal of Physics - a publication of the American Association of Physics Teachers.

Professor David Jackson of Dickinson College is the editor of the journal. He tells Here & Now's Jeremy Hobson why Klotz's answer - the answer now accepted as right - is 38 minutes and 11 seconds, four minutes less than originally thought.

Guest

  • David Jackson, associate professor of physics at Dickinson College.

This segment aired on April 6, 2015.

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