Name: EPIC LEAPS。 (EPIC LEAPS.)
Uploaded: 2021-01-14T10:20:54.000Z
Duration: 8 min 8 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

in honor of Leap Day, I would like to talk about leaps.

様態の副詞

What's the largest leap a living thing could possibly take?

possibly give us evidence that you, me, and all of us

in an airplane, and then a mere 66 years later,

but let's put these two events in perspective.

The Wright Brother's original flight was so brief

inside the external tank of the space shuttle.

What I'm getting at here is that going from the very first airplane

to us landing on the moon only took 66 years.

But to get from the invention of the motorcycle

to the very first successful backflip on a motorcycle

The first successful backflip done on a full sized motorcycle

Now, since then, double backflips and even triple backflips have been done on motorcycles.

But according to calculations done by extreme sport physics,

you will never be able to do any more than four back flips in one jump.

Extreme sports in general are excellent for demonstrating physics—

It's where your weight as caused by gravity acts from.

Now, humans have a surprisingly high center of gravity,

which makes it possible for magicians to do tricks like this one.

also explains why a skateboarder can increase his or her speed

on an incline just by changing how tall they're standing.

It's also the reason you can pump your legs

What you accomplish by pumping your legs on a swing

is an elevation of your center of mass above

you're going to swing back down as if you were

So you gain more and more acceleration each time.

But this is where things get heartwarming.

If you were to cut out the lower 48 states

and then take that shape and figure out how to balance

it perfectly, you would find that the center of mass

for the United States is a town in Nebraska called Friend.

Back to leaps, here's a question you may have asked yourself

while watching certain movies, could a snow boarder

Well, in 2007, Popular Science Magazine said no.

Extreme sports physics points out that Galileo showed that when friction and drag are low,

gravity accelerates all objects at the same rate.

So while it's possible, it wouldn't necessarily be safe.

If you want to get really unsafe, let's go back to Joseph Kittinger.

I've covered this guy in lean backs in the past.

He's the guy who back in 1960 as part of a government experiment

jumped off of a weather balloon 102,000 feet above earth,

so high up that you can see the back of space.

Red Bull may have something hidden up their sleeve.

It's rumored that Kittinger himself may be advising an upcoming project

with Felix Bongardner where Felix will dive

not from 102,000 feet up, but 120,000 feet up.

The difference here is that Felix will be jumping to earth

He will become the first human to break the sound barrier

Earth's gravity loves to pull things down towards it.

But the gravity we experience here on the surface is just one gravity,

one g—it's what causes us to weight what we weigh.

But when we accelerate, we experience more than 1g.

When the world record for the most air achieved on a snow board occurred,

the snowboarder himself experienced four to five g's at the base of the ramp.

Meaning that momentarily, his legs each had to support 700 pounds.

To put this in perspective, astronauts aboard

the space shuttle experience a peak of only 3g's.

More than 5g's experienced for an extended period of time

It's a roller coaster designed to kill the people who ride it.

The first drop accelerates you to more than 200 miles an hour.

And these loops are built to provide a constant 10 g experience for one full minute.

could even survive past the first two loops. Why?

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EPIC LEAPS。 (EPIC LEAPS.)

perspective

entire

demonstrate

thrive