@@AquarianSoulTimeTravelerit's in a vacuum which actually removed one of the forces normally acting on a gyroscope to slow it down... Do you actually pay attention to the videos or just wait to spam pseudoscience?
I remember practicing throwing cards as a teenager, maybe after the first time seeing this guy. Awesome stuff. Note that the force of the card must be waaaay higher than 350g if that's what the scale read. You have to account for the inertia of the paddle and mechanism (I'm sure you know this and just simplified for the video) which I suspect would at least triple the result. It's sort of like shooting a rifle, you're going to feel a good hit on your shoulder from the recoil, but it's nothing like what the target is going to feel at the point of impact. The scale dial is taking a reading at the "shoulder", while the paddle is experiencing the real peak force. I guess you could calculate the energy by measuring the card speed, and also account for the rotational energy at the card tip. I'd be really interested to know what the peak psi is at that leading edge, it must be enormous
Yes you are definitely right about that. Unfortunately, all I had when we decided to try to see the force was that analog scale. So it gave us a very smooth reading of force where we didn’t pick up the maximum peak.
@@TheActionLab Would love to see an "action lab 2" channel where you can talk about such choices and the more granular science behind them without worrying about editing down a neat little package. throw in some comment response and it's gold.
I don't believe force would be a good metric, as it heavily depends on the elasticity of both materials, which isn't always constant with impact speed anyways. What may be more helpful is energy and momentum, with kinetic energy and whatever the energy version of angular momentum is. I swear I used to know what it's called, I'm forgetting
I tried practicing it once, but my mom confiscated my cards because she thought they were the reason why my window was broken even though I broke it after I fell on it when I was walking to the other side of my bed to close the window.
I feel there is more to it than just the speed that helps the card penetrate the styrofoam. The spinning of the card could exert a cutting/shear force on the foam. I could be wrong. It would be nice to examine the slow motion footage.
There is no backspin or forward spin if you are a flying object. Why would you even read something as stupid as beer mats research? A bunch of idiots. Why not use a brain instead.
Hey, Rick Smith. For some reason you made me think of matches. And that's what gave me the idea of lighting matches with abrasive cards, longways across an Olympic size swimming pool. That's a show you could take to Vegas.
Rick Smith Junior was filming with Mark Rober, and now with Action Lab! I subscribed to his channel after watching this video! It is so fascinating how card throwing works!
So cool! I need to start practicing card throwing now. It was great to meet you the other day in the corn, by the way. It's hard to beat this time of year for wholesome family activities.
I would think the spinning of the card increases its tension and therefore rigidity. I've seen videos of people using paper as a saw blade at very high rpm. It's true that a fast moving card could cause damage without rotating, but theres probably a non-negligable difference.
linking back to mythbusters.. but i always had an issue with their car crash tests where jamie would say that a slow and heavy crash is the same as fast and light, yes maybe its the same force value but the crash result would be totally different. Nice to have this explanation of the importance of speed. Always think of that one where they squashed a car with two huge swinging logs. it was so anticlimactic because they had to settle for a slow and heavy crush rather than lifting the logs as high as possible for a faster smashing action.
I know I'm gonna sound nitpicky, but the scale wasn't fixed and it moved from the impact, so the reading is probably slightly incorrect(less than actual). Then again it probably doesn't matter in the grand scheme of things. Great stuff!
there is one more effect at play. when the card hits an object, it has angular momentum so it slices that thing just like the way its easier to cut something when we slide a knife onto something compared to just pressing the knife against it.
Really awesome video man. I love the physics of flight and i live throwing stuff. A friend got me into playing Disc Golf and its fun and the flights of different discs is mesmerizing.
Can I just say I also think that another reason the cards can cut so easily is because they're spinning which almost puts a sliding action onto the edge that hits the carrots or styrofoam, like how a knife it's easier to cut a carrot if you slice along the blade rather than just push down with one spot
on top of that, the rotation itself is improving the slicing, and the centrifugal force is straightening the card against the force that wants to bend it
That's exactly what an Aerobe does when I throw it for distance. It twists and flips. The key here is to bend the Aerobe to curve "right", to prevent a complete twist to a backspin so it stays flat for a long time and a long distance.
1:32 ... Had to slip in that "giving John Bobbitt nightmares" clip in there, like a jump scare. If I had a youtube channel, I would do this every video, just in case he's watching... He's Always Watching...
Just did a pulling test on plastic last week. 100mm/min pull resulted in a pretty quick snap with little stretching. 20mm/min produced like 4-5x stretch length of the object itself. Due to the structure being a big messy bundle at first, but if you pull it slowly, they start to organise in a direct chain until they finally break. Plastic is weird.
In the 70s there was a Chinese assassin (retired), who could throw sewing needles fast enough that they punched through glass windows. It was a very obscure martial art, to be certain. This is almost the exact same skill-set, definitely.
Hey James have you ever heard about how you can get a soda can to crush itself by boiling water inside it, and dunking the top of the can in ice cold water? I wonder if there is any way for someone like you to recreate that, but inside a vacuum chamber. Of course you couldn’t use ice water since it would boil in a vacuum I’m assuming, but maybe with dry ice or something? I don’t know, but I’d love to see you try something like that out!
If it were a finger, it won't 100% cut through due to the strong bone inside, so I would say your injury is not decapitation but a deep bleeding gash. But who knows, I maybe wrong.
The scale doesn't measure force correctly due to inertia. You've made a measurement, how far a spring extends/contracts in response to an impulse, but that measurement doesn't correspond directly to the thing you're trying to measure, the energy imparted to the card upon launch. That form of measurement should significantly under-report the force of a low-mass ballistic object in comparison to a static force applied steadily where inertia does not significantly resist the extension/contraction of the spring.
bro amazing video, though i believe there is another force at play here, when you spin an object it creates centrifugal force so everything from the center of the mass going to the direction of the spin is actually enhanced by additional energy that is stretching out the edges and making them sharp so when it hits it strikes and doesnt bend. I blieve mostly thatsz the reason why when its thrown it cuts and when pushed slowly it bends, the spin makes the card harder on its outside edges because of the stretching forces
it would be interesting to see if you can measure a card thats being thrown without a spin just direct shoot, will it cut or it will bend, that will show it all :)
"When the object is in a backspin. 3:20 ..the top of the disc is dragging air in the direction of the moving object..." In a backspin, the top is moving opposite the direction of the moving object. It's moving backwards, like a retreating helicopter blade and is moving slower than the bottom relative to the air.
Regarding the scale used to measure the force of the thrown card; what about the inertia of the scale mechanism? What is the mass of the weight plate and the gear assembly that turns the dial, as well as the spring that is calibrated to resist the weights placed on the scale? Since the power of the thrown playing card relies so heavily on the impulse, rather than the mass of the card itself, how much of the impulse is lost to just setting the scale into motion. If I were to estimate the actual impulse force of the impact of the card, I would guess over 1kg of force for a short time, possibly more.
Yeah, throwing cards is so fun, and they sure hurt. I learned how to throw cards as a teen and me and my friends used to throw cards everywhere and at anything, that is until I got too good at it. We banned throwing cards at people after I hit one of my friends on the arm and the card cut deep enough to draw blood.
Great video! Though I gotta say the part with the scale is wrong on several levels. First, the maximum force generated in an impact inherently depends on the hardness of the objects. In the ideal case of perfect hardness, the maximum force is infinite. So the maximum force generated in the scale test has no relevance to the styrofoam. Second, the way the scale test is being carried out, it isn't measuring maximum force during the collision at all - scales can only measure force in equilibrium. The maximum reading on the scale can however be used to calculate the energy transferred from the card to the plate during the collision.
I'm interested in how the material of the card could change all of these dynamics. Specifically carbon fiber vs. a credit card vs. something metal like aluminum (would probably have to be thicker).
7:56 I think this is because the scale is just moving down without putting force on the card, but when the scale is fully lowered then the card gets force on it. so this isn’t the best way to measure, Maybe use a scale that doesn’t get pressed down as much, like a digital scale.
Huge upgrade to your production quality with this video. The animations and green screen work with compositing really step things up. I know it must have been a ton of work, but it will pay off!
I'M SORRY. IT'S A JOKE... At first I was like :"Hey? The guy from the McKamey Manor throw cards?? Oh Nope, it's not him. I'm sure... I know Rick is an awesome guy." IT'S A JOKE GUYS!!!! I even subbed to Rick for his trouble, much love guys. 😁 NEVER stop to amaze us James. We love your channel so hard over here.
![PASULOL รามเกียรติ์ ตอนที่ 4 นนทกพบรัก [Ramakien Ep.4: Nonthok in love]](http://i.ytimg.com/vi/tMUQgmZzf_A/mqdefault.jpg)
This is awesome!!! So glad to have been able to meet you and your family!!! Let’s Go!!!!
@@AquarianSoulTimeTraveleryap yap
@@AquarianSoulTimeTravelerit's in a vacuum which actually removed one of the forces normally acting on a gyroscope to slow it down... Do you actually pay attention to the videos or just wait to spam pseudoscience?
Congrats! 💪😎✌️
This was a fascinating video. I've always wondered about this
WOOOOO gonna make a name for yourself here!
I remember practicing throwing cards as a teenager, maybe after the first time seeing this guy. Awesome stuff. Note that the force of the card must be waaaay higher than 350g if that's what the scale read. You have to account for the inertia of the paddle and mechanism (I'm sure you know this and just simplified for the video) which I suspect would at least triple the result. It's sort of like shooting a rifle, you're going to feel a good hit on your shoulder from the recoil, but it's nothing like what the target is going to feel at the point of impact. The scale dial is taking a reading at the "shoulder", while the paddle is experiencing the real peak force.
I guess you could calculate the energy by measuring the card speed, and also account for the rotational energy at the card tip. I'd be really interested to know what the peak psi is at that leading edge, it must be enormous
Yes you are definitely right about that. Unfortunately, all I had when we decided to try to see the force was that analog scale. So it gave us a very smooth reading of force where we didn’t pick up the maximum peak.
@@TheActionLab Would love to see an "action lab 2" channel where you can talk about such choices and the more granular science behind them without worrying about editing down a neat little package. throw in some comment response and it's gold.
Now I wonder what the best way of measuring a thrown card's force would be.
I don't believe force would be a good metric, as it heavily depends on the elasticity of both materials, which isn't always constant with impact speed anyways. What may be more helpful is energy and momentum, with kinetic energy and whatever the energy version of angular momentum is. I swear I used to know what it's called, I'm forgetting
I tried practicing it once, but my mom confiscated my cards because she thought they were the reason why my window was broken even though I broke it after I fell on it when I was walking to the other side of my bed to close the window.
This turned out awesome! You guys are amazing!! Watched this as an entire family around the TV! I approve :)
Thanks for helping get those amazing shots. They looked great!
i do too
Another force to consider in the cutting "rigidity" of the card is the centrifugal force created by the cards rotation.
What a great collaboration! Looked like you guys had some fun putting that together. I also subscribed to Rick’s channel after watching this. Thanks!
I feel there is more to it than just the speed that helps the card penetrate the styrofoam. The spinning of the card could exert a cutting/shear force on the foam. I could be wrong. It would be nice to examine the slow motion footage.
Right, far from enough slomo footage and analysis!
Not only is the science awesome but Rick's throwing accuracy is phenomenal!
Rick is a cool magician! Also founded Magic Gives Back.
What an unexpected collab! Really cool video. I had something else to watch, but the moment I saw the thumbnail. I came running.
There is no backspin or forward spin if you are a flying object.
Why would you even read something as stupid as beer mats research?
A bunch of idiots.
Why not use a brain instead.
Hey, Rick Smith. For some reason you made me think of matches. And that's what gave me the idea of lighting matches with abrasive cards, longways across an Olympic size swimming pool. That's a show you could take to Vegas.
ngl, i clenched when he got those between your fingers! that was amazing!
Rick Smith Junior was filming with Mark Rober, and now with Action Lab! I subscribed to his channel after watching this video! It is so fascinating how card throwing works!
So cool! I need to start practicing card throwing now. It was great to meet you the other day in the corn, by the way. It's hard to beat this time of year for wholesome family activities.
1:32 that genuinely stunned me
SAME
I would think the spinning of the card increases its tension and therefore rigidity.
I've seen videos of people using paper as a saw blade at very high rpm. It's true that a fast moving card could cause damage without rotating, but theres probably a non-negligable difference.
Good point, it may act as a sort of pre-tension.
thats exactly what I think as well, the must get rigit af at that speed
Man is real life Gambit character
He just throws them - Bullseye is the guy who throws cards to cut people
Was looking for this comment
@@joecab1 you are not fun
I had the same thought 😅
@@XDarkGreyX I may not be fun but I know my comics
linking back to mythbusters.. but i always had an issue with their car crash tests where jamie would say that a slow and heavy crash is the same as fast and light, yes maybe its the same force value but the crash result would be totally different. Nice to have this explanation of the importance of speed.
Always think of that one where they squashed a car with two huge swinging logs. it was so anticlimactic because they had to settle for a slow and heavy crush rather than lifting the logs as high as possible for a faster smashing action.
I know I'm gonna sound nitpicky, but the scale wasn't fixed and it moved from the impact, so the reading is probably slightly incorrect(less than actual). Then again it probably doesn't matter in the grand scheme of things. Great stuff!
there is one more effect at play. when the card hits an object, it has angular momentum so it slices that thing just like the way its easier to cut something when we slide a knife onto something compared to just pressing the knife against it.
Very nice explanation sir👏🏻
@@ax.sushi2006 thank you ma'am 🤝
I was a little obsessed with Ricks card throwing skills when I was a kid.
This video is kind of a dream come true
The scale measured 300g, but the instantaneous force at first contact would be even higher.
Brooo! Devin! It’s been a while I’ve seen him. Also, Rick Smith is a legend! A real life Gambit!
Really awesome video man. I love the physics of flight and i live throwing stuff. A friend got me into playing Disc Golf and its fun and the flights of different discs is mesmerizing.
This guy lowkey talking about disc golf, makes me happy
This guy could play in a Marvel movie !
Greetings from France
0:15 one mistake and he's bleeding out💀
Truth be told he has hit someone before who was willing to take it, and it does make you bleed. So yes, one mistake and you bleed out
Can I just say I also think that another reason the cards can cut so easily is because they're spinning which almost puts a sliding action onto the edge that hits the carrots or styrofoam, like how a knife it's easier to cut a carrot if you slice along the blade rather than just push down with one spot
on top of that, the rotation itself is improving the slicing, and the centrifugal force is straightening the card against the force that wants to bend it
The consistent accuracy of this guy is wild
It’s kinda funny, I was thinking of Gambit the whole time.
me too
This is one of my favorite Action Lab videos.
I met Rick a while back at an event. He threw some cards at me at high speeds and I was fine. Pretty fun.
Looking forward to seeing this Gambit video!
That's exactly what an Aerobe does when I throw it for distance. It twists and flips. The key here is to bend the Aerobe to curve "right", to prevent a complete twist to a backspin so it stays flat for a long time and a long distance.
Magnus effect is especially noticeable when you play against Magnus Carlsen.
I understood that reference
I cannot teach my students this method but I can have a ton of fun at home!!!!!!!!!!!!!!!!!!!!!!!!!!!! Thanks
I'm impressed that you trusted him to hit a small target with such accuracy, when one of your fingers could have easily be damaged significantly.
Gambit is proud of this man. Clap clap
Now he just has to figure out how to charge them with explosive energy.
Nitroglycerin covered cards!
A phone battery from one of them fancy flat phones could make a nice incendiary projectile.
Sounds like a pretty risky gambit
@@joatmon7347Flash paper or nitrocellulose! I sent that to James before!
Gambit 😂
Dude is awesome! Real live Gambit! I didn't even know this was possible.
That was an awesome collab!
Reminds me of Ricky Jay's act, and his accompanying book, "Cards as Weapons."
i love when science guys collaborates
So glad to see Rick in a science channel video again!!!
1:32 ... Had to slip in that "giving John Bobbitt nightmares" clip in there, like a jump scare. If I had a youtube channel, I would do this every video, just in case he's watching... He's Always Watching...
Fun interesting video. Really like the explanation of fast Vs slow impacts.
I'd be scared to hold anything small, like the strawberry or what it was. But he's the best, what insane precision. 👍💪✌
Thanks for the video i loved it!
Just did a pulling test on plastic last week. 100mm/min pull resulted in a pretty quick snap with little stretching. 20mm/min produced like 4-5x stretch length of the object itself. Due to the structure being a big messy bundle at first, but if you pull it slowly, they start to organise in a direct chain until they finally break. Plastic is weird.
Astonishing!
Thank you Rick Smith!!!
Oh no look at that guy's fingers!
In the 70s there was a Chinese assassin (retired), who could throw sewing needles fast enough that they punched through glass windows. It was a very obscure martial art, to be certain. This is almost the exact same skill-set, definitely.
Hey James have you ever heard about how you can get a soda can to crush itself by boiling water inside it, and dunking the top of the can in ice cold water? I wonder if there is any way for someone like you to recreate that, but inside a vacuum chamber. Of course you couldn’t use ice water since it would boil in a vacuum I’m assuming, but maybe with dry ice or something? I don’t know, but I’d love to see you try something like that out!
This is why I use the “tomahawk” method the most when playing disc golf.
The Thumbnail Is Really Good
If it were a finger, it won't 100% cut through due to the strong bone inside, so I would say your injury is not decapitation but a deep bleeding gash. But who knows, I maybe wrong.
My friends will tell you that I'm decent at card throwing, but wow. I bow down to Mr. Rick!
You should invite him back and have some thin cards made out of acrylic with sharpened edges and see what he can do with those
The scale doesn't measure force correctly due to inertia.
You've made a measurement, how far a spring extends/contracts in response to an impulse, but that measurement doesn't correspond directly to the thing you're trying to measure, the energy imparted to the card upon launch. That form of measurement should significantly under-report the force of a low-mass ballistic object in comparison to a static force applied steadily where inertia does not significantly resist the extension/contraction of the spring.
oh wow! that is amazing and love those kits for the kids and l would be nervous to hold the celery
This is such a cool video. You’re making better & better videos
My favourite TH-camrs are making video together! Wow 🤩!
No point asking Rick who his favourite X-Men hero is...
Gambit!
Look at @4:20 lol
@@lamueljsackson1376 Yeah I thought that was funny but at the end it said he was shooting something in the character of Gambit, so makes sense! Haha.
Conan O'Brien called. He wants to come over to play hair sharks. 😬
Thats fast!
bro amazing video, though i believe there is another force at play here, when you spin an object it creates centrifugal force so everything from the center of the mass going to the direction of the spin is actually enhanced by additional energy that is stretching out the edges and making them sharp so when it hits it strikes and doesnt bend. I blieve mostly thatsz the reason why when its thrown it cuts and when pushed slowly it bends, the spin makes the card harder on its outside edges because of the stretching forces
it would be interesting to see if you can measure a card thats being thrown without a spin just direct shoot, will it cut or it will bend, that will show it all :)
I found this video absolutely fascinating. 👍🏻
Rick showing up on the Action Lab channel: Wooimbouttamakeanameformyselfere
"When the object is in a backspin. 3:20 ..the top of the disc is dragging air in the direction of the moving object..." In a backspin, the top is moving opposite the direction of the moving object. It's moving backwards, like a retreating helicopter blade and is moving slower than the bottom relative to the air.
I learned to throw cards from Ricky Jay, the author of Cards as Weapons. A close up magician and comedian.
There used to be a TV show called The Magician where Bill Bixby played a card-throwing magician/crime fighter.
I was just going to type the same thing. You beat me to it.😊
I first saw card-throwing act in a movie over 30 years ago. I thought it was just movie magic. Now I believe it's REAL.
Regarding the scale used to measure the force of the thrown card; what about the inertia of the scale mechanism? What is the mass of the weight plate and the gear assembly that turns the dial, as well as the spring that is calibrated to resist the weights placed on the scale? Since the power of the thrown playing card relies so heavily on the impulse, rather than the mass of the card itself, how much of the impulse is lost to just setting the scale into motion. If I were to estimate the actual impulse force of the impact of the card, I would guess over 1kg of force for a short time, possibly more.
Oh yes, card throwing, and the Sly Cooper flashbacks it gives. Man I miss that old PS2 game.
~320 ~~ 325 grams. The scale rotated backwards from the sudden impact and release of force, making it roll backwards into the 350 range.
dopest collab🙀😻
Now THAT was astounding...........................
Seems after centuries of searching him in real life we finally found the real Gambit
You should look into how/why a curling rock curves down its path. It’s mind boggling!
Yeah, throwing cards is so fun, and they sure hurt. I learned how to throw cards as a teen and me and my friends used to throw cards everywhere and at anything, that is until I got too good at it. We banned throwing cards at people after I hit one of my friends on the arm and the card cut deep enough to draw blood.
Those AOL coasters were excellent Frisbees.
I don't get how people can possibly thumbs down this content...
Great video!
Though I gotta say the part with the scale is wrong on several levels. First, the maximum force generated in an impact inherently depends on the hardness of the objects. In the ideal case of perfect hardness, the maximum force is infinite. So the maximum force generated in the scale test has no relevance to the styrofoam.
Second, the way the scale test is being carried out, it isn't measuring maximum force during the collision at all - scales can only measure force in equilibrium. The maximum reading on the scale can however be used to calculate the energy transferred from the card to the plate during the collision.
was wondering about that, the card destroys itself on the scale, crumpling up, so a lot of energy was lost there.
He is real life Gambit 💪😎
Definitely do an episode on disc golf!
Speed kills.
Very cool colab.
I'm interested in how the material of the card could change all of these dynamics. Specifically carbon fiber vs. a credit card vs. something metal like aluminum (would probably have to be thicker).
7:56 I think this is because the scale is just moving down without putting force on the card, but when the scale is fully lowered then the card gets force on it. so this isn’t the best way to measure, Maybe use a scale that doesn’t get pressed down as much, like a digital scale.
Woo, I'm about to make a name for myself here!
Huge upgrade to your production quality with this video. The animations and green screen work with compositing really step things up. I know it must have been a ton of work, but it will pay off!
It's called kinetic energy. Make anything move fast enough and it becomes a weapon.
Facial expressions in slo-mo need refining 😂 Ninja though 😁
It's funny how people that are very concentrated on someting always look so silly lol
Thanks Rick Smith.
Rick can literally effectively defeat a bad guy with a gun, either slicing his gun in half or his fingers.😂
Beer mats make bad Frisbees is the codename you give something when you don't want others to read/be interested in.
Right up there with Tube Alloys!
I'M SORRY. IT'S A JOKE...
At first I was like :"Hey? The guy from the McKamey Manor throw cards?? Oh Nope, it's not him. I'm sure... I know Rick is an awesome guy."
IT'S A JOKE GUYS!!!!
I even subbed to Rick for his trouble, much love guys. 😁
NEVER stop to amaze us James. We love your channel so hard over here.
The Gambit of our universe!
Wow! How can he be so accurate?