Kind: captions
Language: en
[Applause]
can you just like yo-yo like a basic
yo-yo you go like this but this is not a
basic yo-yo no oh
[Music]
you that that is
awesome nicely done this is Ben coni
he's got a brand new channel on YouTube
which is about yo-yoing like a crazy
person uh but I'm going to try to figure
out how this is possible how is it
possible with a string that's not
connected to the yo-yo to get it to do
all of these insane
things
who how did you learn to do that that's
crazy uh just a lot of like Lely
Saturday
nights so watch this motion here there
and then talk up yeah you got it this is
not going to happen you got it dude pull
up ooh that was close Tu up
oh pull up there you go this
guy so how does this work when the yo-yo
is released it unspools as it falls
gaining kinetic energy and rotational
energy from the gravitational potential
energy it had to start with yo-yos can
spin really fast around 6,000
revolutions per minute that's about as
fast as most car engines can turn over
and this is important because it gives
the yo-yo gyroscop stability which means
its axis of rotation is maintained even
if there's a breeze or some little
disturbances now since the yo-yo has a
lot of angular momentum it continues
spinning in the same direction but when
Ben tugs the string he pulls it from one
side of the yo-yo over to the other so
now as the yo-yo continues spinning it
binds the string to the spool and starts
to roll up the string if you look
closely at this shot you can actually
see the exact moment when the string
binds to the spool preventing the yo-yo
from unraveling further and falling off
the string
[Music]
that's all there is to it yeah there's
no science behind it at all to release
the yo-yo Ben throws it out and upwards
without pulling back so it completely
unspools and it continues spinning at
the same high rate of rotation but how
does he catch it with just a
string so the way yo-yos actually do
roll up is there's
friction pads inside the yo-yo these
ones are made out of silicone you you
see this like little Gap in the inside
when that string goes inside um that
creates friction and while it's spinning
it rolls the yo-yo up so if Ben can
Lodge the string in the gap of the yo-yo
it catches on the friction pads and the
yo-yo starts to roll up the string again
even without the friction pads when the
string wraps around the axle it creates
a significant amount of friction in the
same way that ropes wrapped around
ballards hold big ships to their docks
the amount of tension a coiled rope or
string can hold is given by the belt
friction equation this equation shows
that the force the string can exert on
the yo-yo increases exponentially with
the angle the string makes around the
axle so even a few turns around the
yo-yo allow Ben to pull it back into his
hand what is your uh favorite yo-yo
moment my freestyle in 2011 the crowd
stood up and it felt good brought tears
in my eyes but I went back to my hotel
room to cry cuz I was happy it's a good
moment
awesome
[Music]
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also want to thank uh Daren and Dyke who
filmed the slow motion shots in this
video he is phenomenal uh that's why
this video is so cool and also of course
Ben coni because he spent years of his
life perfecting the skills that you saw
demonstrated here if you want to see
more of him you can go check out his
channel link is in the description so
again I want to thank all of these
people and I want to thank you for
watching