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What would happen ifl drilled a
tunnel through the center of the
Earth and jumped into it?
Although it would be impossible to do this on
earth, you actually could do this on the moon.
The moon has a cold core and it also doesn' t
have any oceans or groundwater to mess things
up. In addition, the moon has no atmosphere, so
the tunnel would have a nice vacuum in it that
eliminates aerodynamic drag.
So, imagine that the tunnel through the moon is
20 feet (7 meters) in diameter. Down one side is a
ladder. If you were to climb down the ladder, what
you would find is that your weight decreases,
Gravity is caused by objects attracting one
another with their mass. As you descend into the
tunnel, more and more of the moon' s mass is
above you, so it attracts you upward. (Once you
climbed down to the center of the moon you
would be weightless. The mass of the moon is all
around you and attracting you equally, so it all
cancels out and you would feel weightless.
If you were to actually leap into the tunnel and
allow yourself to fall, you would accelerate toward
the center to a very high speed. Then you would
zoom through the center and start decelerating.
You would eventually stop when you reached the
tunnel' s lip on the other side of the moon, and
then you would start falling back down the tunnel
in the other direction, You would oscillate back
and forth like this forever.
If you could do this on earth, one amazing effect
would be the ease of travel. The diameter of the
earth is about 12, 700 kilometers (7, 800 miles), If
you drilled the tunnel straight through the center
and could create a vacuum inside, anything you
dropped into the tunnel would reach the other
side of the planet in just 42 minutes!
Thanks for reading.
20 NEVER AGAIN