Have you ever wondered how long it would take to fall through the Earth to get to the other side? And not by taking some special driller vehicle like in the movie The Core, were taking about jumping into a hole that goes from one side of the Earth to the other.
And while this entire experiment might sound like a waste of time, this scenario is often presented to introductory physics classes using a gravity tunnel model, which is a tube drilled from one side of the Earth to the other right through the center. The answer thats been taught for nearly a half-century for how long the fall would take is an estimated 42 minutes and 12 seconds.
But this answer has turned out to be wrong because previous calculations in the experiment assumed the planet was uniform. That was until someone by the name of Alexander Klotz, a graduate student in physics at McGill University in Montreal, Canada, predicted that an object should fall through Earth in 38 minutes and 11 seconds, instead of the 42 minutes and 12 seconds that was previously predicted. The difference is that his planetary reference model is based on seismic data. Speaking of seismic data, a lot of the data we have on the inner structure of the Earth comes from seismology, which is data collected from Earthquakes traveling through the ground.
Even if there was such a hole you could jump through to get to the other side of the planet, you might not be able to get there for a couple of reasons. In fact, you might be trapped in the hole forever after you jumped in, and well explain why.
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