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Skiing Biomechanics

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Shower_Boy
Posts: 155 - Karma: 1,373
So I'm taking a biomechanics class this semester and I'm trying to find as many ski related examples as possible to talk to my professor about. A couple ideas I already I have are the physics behind nosebutters, I showed my teacher Mango's iconic nosepress backflip and harlaut's trip cork nosebutter to win gold. I also thought of looking into the physics behind what makes grabs so difficult like A Hall's seatbelt grab versus a basic safety grab. Another one I got was how bad is it on your knees to land screaming semen and to do caribous. If you guys have any other ideas with times you were like bruh how the fuck did he possibly pull that off throw me the idea with a video and maybe we can figure out the biomechanics behind all the crazy stuff that happens in the ski world
Feb 3 2020 11:56AM
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SofaKingSick
Posts: 9327 - Karma: 61,270
pretzeling? the mechanics of how you stop your momentum and go the other way could be interesting

snow loop and jesper's rail/box loop came to mind, but maybe that's less biomechanics and more "just" physics depending on the focus of your class
Feb 3 2020 12:40PM
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Andi_G
Posts: 3083 - Karma: 15,099
Henrik's NB 180, AHall cork 180, and Syrja's/Antti's rodeo 180 things would be awesome to look at because they're using the movement of their bodies to counteract and stop rotations. You can get the rotational force and momentum from the initial spin and then figure out how much energy the skier needs to generate to stop it at 180!

Another cool one to look at might be Daniel Hanka's shifties for looking at how to speed up and slow down how spins look using your body
Feb 3 2020 12:51PM
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SavageBiff
Posts: 3483 - Karma: 14,753
The effects of pizzaing should b studied
Feb 3 2020 1:03PM
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Mooseknucke
Posts: 15 - Karma: 134
I took biomech last semester, one example our prof used was the force of friction of the ski on snow and FG acting on the skier that is involved in down skiing in general. Force of gravity is straight down however is changed with the slope. Therefore, the scale is changed with degree of the slope. It splits force of gravity into two compents FGY and FGX.
Feb 3 2020 1:31PM
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OregonDead
Posts: 6925 - Karma: 24,825
switch pizza
Feb 3 2020 1:42PM
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dolanslebensraum
Posts: 5959 - Karma: -13,099
Op just do it on precession (corkscrewing). You can tell your teacher/class about how the earth is technically corkscrewing just like a skier does wobbling around its main rotation axis.

**This post was edited on Feb 3rd 2020 at 1:48:54pm
Feb 3 2020 1:48PM
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TheClap.
Posts: 21671 - Karma: 4,158
Peps 270 revert at the JOI
Feb 3 2020 6:55PM
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ReturnToMonkey
Posts: 6416 - Karma: 69,672
moose14I took biomech last semester, one example our prof used was the force of friction of the ski on snow and FG acting on the skier that is involved in down skiing in general. Force of gravity is straight down however is changed with the slope. Therefore, the scale is changed with degree of the slope. It splits force of gravity into two compents FGY and FGX.


Gravity is actually fake because of the flat Earth but good try buddy!
Feb 3 2020 7:20PM
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Mr.Lumpyjumbles
Posts: 157 - Karma: 1,442
The mechanics of T Hall breaking his ankles on Chad's.
Feb 3 2020 9:41PM
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xxACIDTRIPxx
Posts: 5980 - Karma: 8,175
Study how full tilts affect biomechanics
Feb 4 2020 3:28AM
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dolanslebensraum
Posts: 5959 - Karma: -13,099
TheClap.Peps 270 revert at the JOI


That trick was insane i remember.
Feb 4 2020 4:46AM
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oldworld_newlife
Posts: 1013 - Karma: 5,251
Answer using science once and for all if you can hit jumps on vishnus
Feb 4 2020 12:26PM
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corona
Posts: 12804 - Karma: 32,822
Mr.LumpyjumblesThe mechanics of T Hall breaking his ankles on Chad's.


Actually solid idea. It wouldn't be too difficult to calculate the actual pressure exerted on his ankles based on the jump characteristics and Tanner's characteristics. Then this can be validated against known values for pressure required for compression fractures in those bones. It was probably a pretty insane number like a ton of pressure per ankle.
Feb 4 2020 12:58PM
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dolanslebensraum
Posts: 5959 - Karma: -13,099
VinnieFActually solid idea. It wouldn't be too difficult to calculate the actual pressure exerted on his ankles based on the jump characteristics and Tanner's characteristics. Then this can be validated against known values for pressure required for compression fractures in those bones. It was probably a pretty insane number like a ton of pressure per ankle.


Do you mean pressure per ankles are broken?
Feb 4 2020 1:52PM
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goldlion
Posts: 51 - Karma: 71
Mr.LumpyjumblesThe mechanics of T Hall breaking his ankles on Chad's.


wow you beat me to it, pretty sick
Feb 4 2020 2:46PM
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Youngm_IPCME
Posts: 1082 - Karma: 2,851
moose14I took biomech last semester, one example our prof used was the force of friction of the ski on snow and FG acting on the skier that is involved in down skiing in general. Force of gravity is straight down however is changed with the slope. Therefore, the scale is changed with degree of the slope. It splits force of gravity into two compents FGY and FGX.


Isn’t that just a block on a plane?
Feb 4 2020 3:45PM
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LukeTheWaffle
Posts: 1845 - Karma: 8,860
Yeah how the fuck a cork 180 works
Feb 4 2020 3:49PM
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Mooseknucke
Posts: 15 - Karma: 134
Young_IMPCIsn’t that just a block on a plane?


yep, exactly. But skiing was the example used.
Feb 5 2020 11:20AM
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clorox
Posts: 1728 - Karma: 4,863
I'd like to know in detail why it hurts to flex my shins foreword after a lengthy tail press/wheelie.
Feb 5 2020 11:44AM
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galardogod
Posts: 1698 - Karma: 5,209
what program are you going to use? Logger pro has video analysis and is good shit.
Feb 5 2020 1:46PM
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