I'm trying to find out that if you dig a tunnel through the center of the earth, then how long will it take to get from one end to the other end?(adsbygoogle = window.adsbygoogle || []).push({});

I can't use x=1/2at^2+vt because gravity is constantly changing when I approach the center of the earth.

And if I find out the gravity, how will I incoporate time into the equation?

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# Travel in the earth

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