Let’s say we’ve got a hole through the earth and it goes from pole to pole. There’s also no air – otherwise you’d reach terminal velocity quickly because of air resistance. Also, assuming the earth has the same density everywhere and is perfectly spherical, you jumped in right into the hole. So how long would would it take for you to reach the other side of the hole?
THIS IS COOL. I WANT TO LEARN SOMETHING ELSE, TOO!
Video via – MinutePhysics
Further Readings And References @ Hyper Physics, Shell Theorem (Wikipedia)
ScienceSwitch 
Oh 😦 Anyway, glad you liked it. 😛
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Interesting but unfortunately I cannot understand much the computations haha! 😉
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It is certainly a question that has never occurred to me, but extremely interesting. I shared the video with my grandson. He always asks the great questions.
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I hope they benefit something from this video. Thanks for stopping by! 🙂
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Just to say that I’m happy to visit your interesting blogsite but I don’t want to be sent your articles unsolicited. If this continues I will regretfully have to stop following your blog. Thank you.
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Sir, if you follow a blog, every time that blog publishes a post, it will be automatically sent to your inbox. It’s not in my control, but you can set it in your preferences – like how often you want to receive post updates (from the blogs you follow of course). I hope you understand that, and sorry for the inconveniences. Thank you! 🙂
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Thanks, it was the new top option that confused me. Look forward to receiving email notification of your new posts …
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No problem, Sir. 🙂
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