What If? (31 page)

Read What If? Online

Authors: Randall Munroe

Free Fall

Q.
What place on Earth would allow you to free-fall the longest by jumping off it? What about using a squirrel suit?
—Dhash Shrivathsa

A.
Th
e largest purely vertical
drop on Earth is the face of Canada’s Mount
Th
or, which is shaped like this:

Source: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

To make this scenario a little less gruesome, let’s suppose there’s a pit at the bottom of the cliff filled with something fluffy

like cotton candy

to safely break your fall.

Would this work? You’ll have to wait for book two . . . 

A human falling with arms and legs outstretched has a terminal velocity in the neighborhood of 55 meters per second. It takes a few hundred meters to get up to speed, so it would take you a little over 26 seconds to fall the full distance.

What can you do in 26 seconds?

For starters, it’s enough time to get all
the way through the original Super Mario World 1-1, assuming you have perfect timing and take the shortcut through the pipe.

It’s also long enough to miss a phone call. Sprint’s ring cycle

the time the phone rings before going to voicemail

is 23 seconds.
1

If someone called your phone, and it started ringing the moment you jumped, it would go to voicemail three seconds before you reached
the bottom.

On the other hand, if you jumped off Ireland’s 210-meter Cliffs of Moher, you would be able to fall for only about eight seconds

or a little more, if the updrafts were strong.
Th
at’s not very long, but according to River Tam, given adequate vacuuming systems it might be enough time to drain all the blood from your body.

So far, we’ve assumed you’re falling vertically. But you
don’t have to.

Even without any special equipment, a skilled skydiver

once he or she gets up to full speed

can glide at almost a 45-degree angle. By gliding away from the base of the cliff, you could conceivably extend your fall substantially.

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ::gasp:: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

It’s hard to say exactly how far; in addition to the local terrain, it depends heavily on your choice of clothes. As a comment on a BASE jumping records wiki puts it,

Th
e record for longest [fall time] without a wingsuit is hard to find since the line between jeans and
wingsuits has blurred since the introduction of more advanced . . . apparel.

Which brings us to wingsuits

the halfway point between parachute pants and parachutes.

Wingsuits let you fall much more slowly. One wingsuit operator posted tracking data from a series of jumps. It shows that in a glide, a wingsuit can lose altitude as slowly as 18 meters per second

a huge improvement over 55.

Even ignoring horizontal travel, that would stretch out our fall to over a minute.
Th
at’s long enough for a chess game. It’s also long enough to sing the first verse of

appropriately enough

REM’s “It’s the End of the World as We Know It,” followed by

less appropriately

the entire breakdown from the end of the Spice Girls’ “Wannabe.”

When we include the higher cliffs opened up by horizontal glides, the times get even longer.

Th
ere are a lot of mountains that could probably support very long wingsuit flights. For example, Nanga Parbat, a mountain in Pakistan, has a drop of more than 3 kilometers at a fairly steep angle. (Surprisingly, a wingsuit still works fine in such thin air, though the jumper would
need oxygen, and it would glide a little faster than normal.)

So far, the record for longest wingsuit BASE jump is held by Dean Potter, who jumped from the Eiger

a mountain in Switzerland

and flew for three minutes and twenty seconds.

What could you do with three minutes and twenty seconds?

Suppose we recruit Joey Chestnut and Takeru Kobayashi, the world’s top competitive eaters.

If we can find a way for them to operate wingsuits while eating at full speed, and they jumped from the Eiger, they could

in theory

finish as many as 45 hot dogs between them before reaching the ground . . . 

 . . . which would, if nothing else, earn them what just might be the strangest world record in history.

  • 1
    For those keeping score, that means Wagner’s is 2,350 times longer.

weird (and worrying) questions from the what if? INBOX, #9

Q.
Could you survive a tidal wave by submerging yourself in an in-ground pool?
—Chris Muska

Q.
If you are in free fall and your parachute fails, but
you have a Slinky with extremely convenient mass, tension, etc., would it be possible to save yourself by throwing the Slinky upward while holding on to one end of it?
—Varadarajan Srinivasan

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