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(科学与基情的碰撞)溜溜!

Stringless Yo-Yo!

你能像这样…玩悠悠球
– Can you just like … Yo-Yo like a basic Yo-Yo
对 就像这样
– Yeah, like this
但这其实不是个普通的悠悠球
– But this is not a basic Yo-Yo
不是
No
喔 是啊
OH
嘿嘿嘿
HHHHHHH
慢动作
MMMM
欣赏
XXXXX
开门杀:凌空一卷!
OOOOO
它很了不起的
That is awesome
做得好!
Nicely done!
这位是本·康德 他在YouTube上有一个视频
This is Ben Conde, he’s got a brand new channel on YouTube
是关于悠悠球的 就像个疯狂的人
Which is about Yo-Yoing like a crazy person
但是我要先算算这成功的可能有多大
But, I’m going to figure out how this is possible
不连线的悠悠球有多大可能完成溜溜?
How this is possible with a string that’s not connected to the Yo-Yo
让它完成那一系列疯狂的事情
To get it to do all of these insane things
绕脖杀:杠上开花
X……X
哇哦!
Wow
我的天!
Gosh!
你是怎么学会的?太疯狂了!
How did you learn to do that? That’s crazy!
嗯哈
Uh
就是无数个孤独的星期六晚上 没女朋友
Just a lot of like lonely saturday nights
看手势 这里 那儿 然后拨起来
So watch this motion here, there, and then you tug up
-你做到了-(德瑞克在笑)这完全不可能啊!
-Yeah you got it -(Derek Laughs) This is not gonna happen!
你做到了 伙计!
You got it, dude!
拨起来-啊啊啊哈 就差一点了!
Pull up- ooooh, that was close!
往上拨!啊…
Tug up! Aww…
拨起来啊!加油![德瑞克欢呼着]
-Pull up! There you go! -(Derek cheers)
所以 这是怎么做到的呢?当这个悠悠球释放 落下
So, how does this work? When the yo-yo is released it unspools as it falls,
从潜在的重力获得动力和回转力能量
gaining kinetic energy and rotational energy from the gravitational potential
悠悠球旋转会很快
energy it had to start with yo-yos can spin really fast
每分钟大概有六千转
around six thousand revolutions per minute.
它和大多数汽车引擎转动那么快 并且这很重要
That’s about as fast as most car engines can turn over, and this is important
因为它能给悠悠球陀螺稳定性 那意味着它旋转的轴线
because it gives the yo-yo gyroscopic stability which means its axis of
即使微风一类的都不会影响中心轴的稳定度
rotation is maintained even if there’s a breeze or some little disturbances
现在自从悠悠球很多角动力 它持续旋转朝着
now since the yo-yo has a lot of angular momentum it continues spinning in the
相同的方向 但当Ben一拽这个线
same direction but when Ben tugs the string
他从悠悠球的一侧拉它 拉到另一侧 现在这悠悠球
he pulls it from one side of the yo-yo over to the other so now as the yo-yo
线被缠绕在线轴上 就会被卷起来
continues spinning it binds the string to the spool and starts to roll up the string
如果仔细观察 你可以看到这一刻
If you look closely at this shot you can actually see the exact moment
绳子牢牢地系在轴上 溜溜球也紧紧地系着
when the string binds to the spool preventing the yo-yo from unravelling
而不会越来越偏离绳子
further and falling off the string.
这是完成它的全过程 是的 它背后完全没什么科学原理
That’s all there is to it, yeah, there’s no science behind it at all.
为了释放悠悠球 Ben把它抛出后没有拉回来 而是让它向上
To release the yo-yo Ben throws it out and upwards without pulling back
所以它完全被释放到空中 继续以一样快的转速旋转
so it completely unspools and continues spinning at the same high rate of rotation
但是他是怎么仅凭一条绳把悠悠球接住的呢?
but how does he catch it with just a string?
其实卷起悠悠球的方法在于它里面有摩擦垫
So the way yo-yos actually do roll up is there’s friction pads inside the yo-yo
这些是用硅胶做的 你看这里有个小间隙
these ones are made out of silicone,you see,this like little gap that inside
当绳子抽向里边时 便会产生摩擦力
when that string goes inside that creates friction
线旋转时就会把悠悠球卷上来
and while it’s spinning it rolls the yo-yo up
如果Ben可以利用悠悠球的间隙卡住绳子
So if Ben can lodge the string in the gap of the yo-yo
绳子就会钩住摩擦垫 悠悠球便可以再次被卷起来了
it catches on the friction pads and the yo-yo starts to roll up the string again
即使没有摩擦垫 当绳子缠绕在轮轴上的时候
Even without the friction padswhen the string wraps around the axle
它也能产生一定程度的摩擦力
it creates a significant amount of friction
就像绳索缠绕在系船柱来防止大船漂离码头一样
In the same way that ropes wrapped around bollards hold big ships to their docks
盘绕的绳索可以支撑的张力是由皮带的摩擦力方程来计算的
the amount of tension a coiled rope or string can hold is given by the belt friction equation.
此方程可以表示绳子作用于悠悠球上的力
This equation shows that the force the string can exert on the yo-yo
是以指数形式增长 而且和绳子与轮轴之间形成的角度有关
increases exponentially with the angle the string makes around the axle
所以即使只有一小转也能让悠悠球被拉回他的手中
so even a few turns around the yo-yo allow been to pull it back into his hand
德瑞克:你最享受悠悠球是在什么时候?
(Derek): What is your favorite yo-yo moment?
在2011年 我表演自由式悠悠球的时候 观众们都站起来喝彩 那感觉很棒
My freestyle in 2011.The crowd stood up and it felt good
我的眼眶都湿了 然后我回到旅馆房间里喜极而泣
It brought tears to my eyes but I went back to my hotel room to cry ’cause I was happy
那是很棒的时刻
It was a good moment
嘿 “真理元素”(YouTube上的科普频道)的这一集有一部分可以在audible.com上查看
Hey this episode of veritasium was supported in part by audible.com
audible.com是最成功的有声读物提供网站
a leading provider of audiobooks
提供了数百上千各个文学领域 比如小说 非小说和期刊的有声读物
with hundreds of thousands of titles in all areas of literature including fiction,nonfiction, and periodicals
又因为audible支持真理元素 所以他们提供给所有这个频道的观众特殊的权利
and because audible supports Veritasium, they give a special offer to anyone who watches this show
如果你浏览audible.com或者veritasium
if you go to audible.com/veritasium
你就可以在一个月内免费下载并听任何一本书
you can download and listen to any book for a one month free trial.
我现在在听的书是一本经典的科学小说
In the book i’m listening to at the moment is a classic of science fiction
叫做库尔特·冯内古特的《第五屠宰场》
it’s Kurt Vonnegut’s slaughterhouse-five
它是一本关于如何摆脱时间的很棒的书
an awesome book about becoming unstuck from time
讲述了外星人和二战 还有一些在这段可怕时光中的经历
it involves aliens and world war two and kind of this weird time travel
但是这只是这本书非凡的一部分而已
but it’s just a phenomenal piece of writing
所以如果你还没有读过或者听过这本书
So if you haven’t read it or listened to it
你可以在免费体验月中去audible.com或veritasium上看看
and you can check it out for one month free trial just go to audible.com/veritasium
我非常感谢audible提供的支持 也感谢达伦•戴克
I really want to thank audible for supporting me and I also want to thank Darren Dyke
在这个视频中制作了慢速效果
who filmed the slow-motion shots in this video
他很杰出 这也是这个视频这么酷的原因 当然还有Ben Conde
he is phenomenal that’s why this video is so cool and also of course Ben Conde
因为他花了很多年来完善他的技巧 而你看到的就可以说明一切
because he spent years of his life perfecting the skills that you saw demonstrated here
如果你想看他更多的消息 你可以去他的频道看看 链接就在简介中
if you want to see more of him you can go check out his channel, link is in the description
再次说明 我要感谢所有这些人和正在观看的你
so again I want to thank all of these people and I want to thank you for watching

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视频概述

Ben Conde的悠悠球科学,一双奇妙的手告诉你世上没有什么不可能。如果你好奇如何成功操控悠悠球,这里有你想要的答案。

听录译者

收集自网络

翻译译者

Ljimnn

审核员

审核团MG

视频来源

https://www.youtube.com/watch?v=-i0InwW0V9k

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