Tweet this: http://bit.ly/IcePhysics — FB it: http://bit.ly/IcePhys
Download a free Audio book: http://bit.ly/AudibleSED
Infographics are Here: http://smartereveryday.tumblr.com/
Figure skate, Hockey skate, and blade diagram Graphics by Kelly Richard.
http://www.helloimkelly.com/
Clap skate, Plantar Flexion, and outro logo by Emily Weddle.
http://emilyweddle.com/
I shot the skaters with a Phantom MIRO LC320S made by Vision Research:
http://www.visionresearch.com/Products/High-Speed-Cameras/Phantom-Miro-M320S/
Most speeds were around 1750 fps, but I shot the Hocket skid at closer to 3500 fps.
Music made by Gordon McGladdery, “A Shell In the Pit”.
Gordon’s work is awesome, you should check it out.
http://ashellinthepit.bandcamp.com/
Glenn Replogle, the Figure Skating and Hockey Player coach was great to work with. Also, a big thanks to Glenn for helping me borrow two skates from the Huntsville IcePlex. http://www.iceskate.org/
Nick Laurila was very helpful and accommodating. We also became friends pretty fast. It would bring me great joy if people reading this video randomly years into the future would randomly tweet hot dog photos with the words “Here’s a Hot Dog on @SmarterEveryDay” to him https://twitter.com/Nick_L12 . He has reminders setup in his phone when local fast food chains have “Dollar Hot Dog day”. It’s quite funny, but deep down I’m jealous of how clever it is.
Robert Farrell answered my Facebook appeal for Photographers/Videographers in the Milwaukee Wisconsin area and filmed the skaters at the Pettit National ice Center for me.
He’s a photographer http://www.robertfarrellphotography.com/
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With thanks to:
JR Ginex-Orinion – he helped me by putting the equation in LaTex and giving me a file. This saved me a lot of time and I’m grateful.
Kevin Butler at the Pettit National Ice Center in Wisconsin was helpful in coordinating the filming of the speed skaters.
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GET SMARTER SECTION
If you want to learn this in detail stop what you’re doing and read the three pages around “Equation 5” in this book. I was particularly interested in the “warm ice” vs “cold ice” issues.
http://bit.ly/1jRa32X
This is also a great article about why ice is slippery:
http://lptms.u-psud.fr/membres/trizac/Ens/L3FIP/Ice.pdf
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Tweet ideas to me @SmarterEveryDay
Instead of saving for my kids’ college, I make videos using the money I would have saved.
The thought is it will help educate the world as a whole, and one day generate enough revenue to pay for their education. Until then if you appreciate what you’ve learned in this video and the effort that went in to it, please SHARE THE VIDEO!
If you REALLY liked it, feel free to support “Smarter Every Day” on Patreon or Subbable.
Warm Regards,
Destin
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“clap skate” so basically a flip flop?…
I knew there were a lot of physics involved with sports but never this much. Great video.
5:33 yeah, but most all of it is subconscious, like unicycling
2:04?
Never knew there was a double edge
On the subject of the mathematics done in the hockey player’s head, I want to bring up Brian Cox’ old joke; “can a chimpanzee be thought to do trigonometry?”. Movement can be described by mathematics, but the “feel” that every athlete shows, definitely works by another mechanism. We refer to it as “muscle memory”, but I don’t think I like that term.
What about “neuroefficiency”? When all the equations have been solved again and again, maybe a “table of all the equations and their answers” is embedded into the very structure of the brain, simplified and reinforced over years of practice, to the point where the sound of an approaching hockey puck drowned in background noise and a shadow in the corner of your eye triggers a series of muscle contractions to hit the puck while most of your brain is free to continue the interview.
It turns out that the basic physics of the slipperiness of ice is more complicated than that and still not completely understood.
Actually the PRESSURE is melting the ice to create the thin water layer between the blade and ice.
The torque in figure skating is immense- it can be up to 10x one’s body weight. Adult figure skater here 🙂
Do a vid on fencing….some interesting blade behaviors going on there.
2:04 B**** WHAT THE F*** CLONE SCIENCE IS POSSIBLE !!!! AHHHHHHH
Red people don’t win gold medals.
Does anyone else have this irrational fear of getting their fingers chopped off by an ice skate?
Hey Destin can you do a smarter every day on skiing
goalie skate should be in there to
I think the outstretched arms of figure skaters act in the same principle of (counter)balancing like the tails of animals which sprinted or moved & need their tails to help them navigate their bodies. Also, just like when acrobatics use them (any free limbs too) when they do their thing as well XD
I’ve always admired and wished to be a hockey player but this makes me admire them even more. I KNEW it took skill and practice but wow…
Hockey = op in my life
This is so awesome.
You should do a similar video about skiing.
Why do I feel like I’m the only one that lives in Milwaukee?
A deeper edge on a hockey skate is not slower. The depth of edge better correlates to how easy it is to move laterally vs. forwards and backwards. A deeper cut blade allows you to get more power into the ice, since your skates are angled as you stride. Since the deeper cut blade restricts lateral motion, more of your stride power goes into moving you forward. For goalie skates, you use a shallower cut blade, since you want to be able to move laterally more easily, but the trade-off is that it’s more difficult to skate forward and backwards, which is why goaltenders use c-cuts for a large portion of their movement.
Great Video! Thank you very much. I’m getting smarter by the second watching your videos. 😉
“Toe pick!”…lol
What would happen if you heated up the skates? Would the skates go faster due to the ice melting faster or would it slow it down do to more friction because there is more of a divot
You forgot one more skate. The goalie skates. We have very different blades so we can push around on the ice
Hockey players are not geniuses. Ive played hockey for 12 years and ive never met a smart hockey player
I hate most of the garbage on this channel, this is an exception. Good work
12/28
I hate hate hate figure skates after 10 minutes of hockey skates I was never able to go back
5:29 it’s not like that at all lmao
Is ice “slipperier” for heavier skaters? Or not enough pressure to make a difference? & if I’d did would that mean more falling or better spins?
he rolls his neck so much
This is amazing but I gotta say no hockey player uses their knowledge of physics and math in order to stop, as hockey is a fast paced game it the actual physics and maths that goes in to it is really cool.
Im sorry but this isnt that complicated ! Most of it becomes 2nd nature with practice.
Either you dont play sports or you are just over-complicating things.
whats with the random cartel like mattress companies popping out of nowhere with the “witty” commercial wars
i am 10 and i play hockey, so i am a young genius
im a figure skater and i have never stopped any way other than then going in and out with my skates
Maybe take a look at goalie skates in hockey. There alot different from from player skates and how we use them is also.
My teacher asked us how does ice skating work and because of your Video i got a better grade…..so thanks
It’s not the force exerted on the ice by the person that creates the thin layer of water. The thin layer of water is inherently already there simply based on the atmospheric conditions at the surface of the ice. If you actually use the equations at the end you’ll see that our weight in the ice makes barely a difference
Yeah I don’t know about having to be a genius to play hockey. I started playing hockey when I was five and stopping is all muscle memory! Great video though!
Such an epidemic of mansplaining, sad.