The Physics of "Punkin Chunkin"

Поділитися
Вставка
  • Опубліковано 28 лис 2024

КОМЕНТАРІ • 481

  • @atee369
    @atee369 Рік тому +4

    Flagging this video as needing (not just auto-generated) subtitles. Please help us hard of hearing and deaf folks access your content!! 🥰🤟🏻

  • @Cyquel196
    @Cyquel196 12 років тому +3

    I made a trebuchet when I was 13. Saved up for ages to buy the materials and it took ages to construct. On it's first test run my payload (a large rock) amazingly flew directly upwards, came back down and destroyed all my hard work. It was awesome.

  • @tornado42123
    @tornado42123 12 років тому +1

    Punkin Chunkin was one of those things that I thought that I wouldn't enjoy, but to my surprise it is now one of the many things that I look forward to when Thanksgiving rolls around.

  • @Altorin
    @Altorin 12 років тому

    I haven't seen one, but I imagine the difference is pretty simple. Fermentation is a specific process in which a fungus eats organic materials and produces a gas (usually carbon dioxide) and an alcohol (usually ethanol)
    Rotting is a general process in which organic material breaks down in many number of ways, including fermentation but also self-activated cell death (either through running out of energy or burned through some corrosive liquid) and being eaten by small animals and plants.

  • @Rithene
    @Rithene 12 років тому +3

    I made a marshmallow-throwing trebuchet in physics class my junior year of high school. As it happened, my uncle was in town at the time, and between him, my dad, and me, the design ended up being a chest-high contraption of awesome.

  • @MonarchOfTheElves
    @MonarchOfTheElves 12 років тому +2

    I watch this every year with my grandfather. The best bonding time ever.

  • @WisemanSam599
    @WisemanSam599 12 років тому

    Energy, as a physics term, refers to the ability to cause change. The simplest form of energy is work, which is force applied over distance. Because of the conservation of energy, all other types of energy can be converted back into work. So a pumpkin with 100 joules of kinetic energy has enough energy to apply a 10 N force for 10 m, or a 1 N force for 100 m, etc. People talk about converting matter into energy, but it's probably more accurate to say that matter is a form of stored energy.

  • @juliathecoolcat
    @juliathecoolcat 12 років тому

    YES!! DELAWARE! I LOVE IT WHEN PEOPLE TALK ABOUT US!! Gosh sorry, it's just real exciting to here about your state when people normally forget about you

  • @gulllars
    @gulllars 12 років тому

    It would be an awesome sight if a small army of Punkin Chunkers rolled up on the outskirts of a small town, and started flinging their squishy projectiles at the town centre at the same time :)
    Could be fun to set up and film in a "ghost town".

  • @jeckert547
    @jeckert547 12 років тому

    Its some dinner pilgrims and native americans had a long time ago. It became a tradition. We eat turkey dinners and give thanks about stuff. thats it put pretty simply.

  • @ekotar1
    @ekotar1 12 років тому

    @2:32 Wrong. since g is constant, and f=ma, only the mass is variable in how much force is applied to the pumpkin. The variable affected by the height of the counterweight is how much time it has to accelerate the pumpkin before it leaves the trebuchet, thus having a higher counterweight affects the velocity of the pumpkin, but not the force applied to it. It is momentum that is force over time, and thus the higher the counterweight and the heavier, the more momentum it gives the pumpkin. DFTBA

  • @9Mystere9
    @9Mystere9 12 років тому

    Not a ton to say about them. They're basically electrons with a positive charge. They're generated during radioactive decay depending on the isotope, and when one meets an electron it results in annihilation of both particles and a release of energy. A positron can join with an antiproton to form antihydrogen.

  • @Bmambl
    @Bmambl 12 років тому

    Yes I have. I've also formally studied Newtonian mechanics. If you consider the noninertial frame of the rotating ball, centrifugal force appears, clear as day. You have to appreciate the laws of physics as we know them only work for inertial frames (ie constant speed frames). He even admits as such. I'm not arguing that it doesn't exist in the stationary frame of reference, but I AM saying that it exists in some frames of reference.

  • @PyroDesu
    @PyroDesu 12 років тому

    Were I to join the Punkin' Chunkin' contest, I would be in a new category:
    Railguns/Coilguns.
    Place pumpkin in ferromagnetic sabot - build up a helluva lot of electricity in a capacitor bank, release into rails, watch squash fly at mach 17, landing 370 km away (actual figure gotten by the US Navy on one of their test railguns).

  • @vwoxy1
    @vwoxy1 12 років тому

    i is defined by the property i^2=-1, because -i is just as valid a solution to x^2=-1.
    i^2=-1 is equivalent to i=(-1)^.5, but square roots are inelegant, so we square both sides to get i^2=-1. We also tend to avoid the i=(-1)^.5 definition because that can lead to the false assumption i^2=(-1)^.5*(-1)^.5=(-1*-1)^.5=(1)^.5=1. This false assumption gives a much better reasoning for the existence of i than what I gave earlier. It's much easier to keep track of i than negative square roots.

  • @theTofuCube
    @theTofuCube 12 років тому

    Oh man, Pumpkin Chunkin'. Stayed home sick one day, watched 5 straight hours.

  • @coolteamblt
    @coolteamblt 11 років тому

    When discussing the possibility of doing sponsored videos, this one should be held up as an example of how to do it. It feels like it belongs on this channel; it's interesting and well done, like the rest of their work. My main quibble is that I wished the intro or something inside the video itself made it clear that The Science Channel paid for the video, like bloggers have to clearly label sponsored blog posts.

  • @ltericdavis2237
    @ltericdavis2237 12 років тому

    In 2003, i think, my high school built what was basically a giant pumpkin slingshot and one first in the youth division! Over 900 yards! That was before i went to high school and last year we sold the contraption to help buy a robot for FIRST robotics.

  • @thegardenpear
    @thegardenpear 12 років тому

    the blue centrifugal, Bad to the Bone, is seriously frightening to behold. They literally clear everyone out from behind it just in case it, yah know...explodes. Cuz that's what it looks like it's gonna do EVERY time.

  • @ADVscout
    @ADVscout 12 років тому

    please tell me your appart of Science Channel now. Scishow and Science Channel combined.... *melts*

  • @ZoggFromBetelgeuse
    @ZoggFromBetelgeuse 12 років тому

    When I was a young alien, I build a pumpkin catapult consisting of a vertical, pumpkin-caliber, nearly-vacuum tube with a pair of teleport gates at the ends, and a switch to connect the bottom gate to a third, 45° upwards pointing ejection gate. The idea was to put the pumpkin into the falling tube, to let it accelerate between the gates, and to turn the switch once it had reached terminal velocity.
    It was fun! The pumpkin almost reached escape velocity once. I wonder where it went down.

  • @links212
    @links212 12 років тому

    Can we have a great minds on Joseph Fourier? He is relatively obscure but undoubtedly a supergenius.

  • @peon17
    @peon17 12 років тому

    In high school a couple friends and I decided to build a trebuchet out of boredom. It wasn't nearly on the scale of these, but it did throw a softball well over 100 yards. Not bad for a few goofballs just messing around after school.

  • @Telliria
    @Telliria 12 років тому

    8pm... where!? As your viewers are from all over the world it'd be nice to get a time zone specification. Great video, dftba!

  • @OutlawCorwin
    @OutlawCorwin 12 років тому

    I'm happy you pronounced trebuchet like you did. Apparently it's supposed to be pronounced tree-bucket or tré-boo-shet, which make it sound about 10 times less cool.

  • @oldworldhuman
    @oldworldhuman 12 років тому

    the cut seen graphics are so nice in scishow, very comfortable visual transitions.

  • @johnlloyd7794
    @johnlloyd7794 12 років тому

    YES. They said Delaware. I have never been so happy to be from Delaware

  • @ArosIrwin
    @ArosIrwin 12 років тому

    On the science channel and who ever owns "Scrapheap Challenge" broadcasting rights at this point.

  • @mina86
    @mina86 12 років тому

    If we are nitpicking, than centrifugal force is not inertia at the very least because inertia is a scalar and a force is a vector. The point however is that it's not a “real” thing in the sense that there is nothing that exerts that force.

  • @LManio
    @LManio 12 років тому

    catapults: not only used for apulting cats... Hank you crack me up lol.

  • @danielreid
    @danielreid 12 років тому

    Sponsored video??? AWESOME!! GO SCI SHOW!!!!

  • @kaya347
    @kaya347 12 років тому

    Nice punkin chunkin commercial. I intend to watch at some point.

  • @j99450
    @j99450 9 років тому +11

    I want to see a railgun pumpkin chuncker.

    • @HydratedBeans
      @HydratedBeans 8 років тому +1

      +Joe Long I was thinking this too.

  • @Y2Ksnowglobe
    @Y2Ksnowglobe 12 років тому

    I highly suggest your local hobby store. They often have tiny pumpkins for dollhouses.

  • @JamesRPatrick
    @JamesRPatrick 12 років тому

    The worst thing a science education advocate can hear: "but please, don't try this at home...just watch from the safety of your sofa." Hank, you disappoint me.

  • @kurtilein3
    @kurtilein3 12 років тому

    if the basket or pouch the pumpkin is in is well-done and nicely supports the pumpkin, they can really survive a lot. So far the most extreme machines dont yet really run into such problems. and you could if necessary switch to melons, they are more durable, more dense and more round.

  • @helpnxt
    @helpnxt 12 років тому

    Hey Hank and other science enthusiasts like myself,
    I am not only a science lover but I love films and media and creating all those types of things, now I realise that science and films haven't exactly gone hand in hand in the past as films have tended to ignore every rule of physics in the book at some point or another.
    But my question to everyone and Hank is if you could watch a film based around a science type event or story what would it be??

  • @thegardenpear
    @thegardenpear 12 років тому

    I WAS THERE...!
    Bridgeville, DE. Where hippies, hillbillies, college kids and engineers all come together to get drunk and chuck pumpkins.

  • @SWDennis
    @SWDennis 12 років тому +5

    Next year i will win this with my railgun!

  • @MrMielke
    @MrMielke 12 років тому

    I know what they mean, but build-up air-pressure could be considered an explosive.
    I've tried building a trebuchet with some friends. I don't know what you mean by more accurate. It didn't even shoot forward all the time. :P
    I see some suggesting rail-guns. They require a huge amount of electricity even with a good conductor, which pumpkins aren't. You could use a metal casing, but does that really count as throwing the pumpkin?

  • @MyAJ91
    @MyAJ91 12 років тому

    When dealing with rotating systems it is often useful to use a rotating reference frame. And that includes recognizing all the oddities of a rotating reference frame- most notably the centrifugal and Coriolis forces.
    And I see people misunderstanding as an opportunity to explain- not to dismiss the topic as non existent.

  • @averyluver1
    @averyluver1 12 років тому

    Best. Title. Ever.

  • @wolf92193
    @wolf92193 12 років тому

    Exploding pumpkin catapults. Hell, yeah!

  • @spenore
    @spenore 12 років тому

    It always feels weird when people say thanksgiving a month after i celebrate it

  • @Bongo1020
    @Bongo1020 12 років тому

    Correct me if i'm wrong but weren't roman catapults torsion machines? They used ropes to build up force as shown in the video.

  • @CattyAttie
    @CattyAttie 12 років тому

    Curiosity found something! Er well, it may have. Apparently NASA isn't going to say what it is for sure yet. But it's supposed to be big! So excited!

  • @doctorrs99
    @doctorrs99 12 років тому

    The only difference between an anti-electron and an electron is that the anti-electron has a positive charge, when normal electrons has a negative charge.

  • @mariansmith9685
    @mariansmith9685 12 років тому

    A pumpkin is not a vegetable; it's a fruit! In fact, it's a berry. Pumpkins belong to the family Cucurbitaceae, which includes cucumbers, melons, squash, and gourds.

  • @mina86
    @mina86 12 років тому

    It's definitely not a pointless concept, as usage of non-inertial reference frame can greatly simplify models and calculations.
    And the point that, I think, people are making when they say that “centrifugal force is not a thing” is to point to non-scientists that their intuition that there is something pulling things outwards is incorrect, but it is not to dismiss the concept all together. I think that MyAJ91 feels the same way in light of his √-1 remark.

  • @twelvecatsinatrenchcoat
    @twelvecatsinatrenchcoat 12 років тому

    I like how we're warned not to try this at home, as if the people doing it at the events were in any way qualified.

  • @vwoxy1
    @vwoxy1 12 років тому

    Centrifugal force does not exist in inertial reference frames. In rotating (and therefore accelerated, i.e., non-inertial) reference frames, it does.

  • @Mtierney21
    @Mtierney21 12 років тому

    If you were to disassemble a person and lay their atoms next to each other in a line, how long would it stretch?

  • @kurtilein3
    @kurtilein3 12 років тому

    thats why even some universities do their own competitions, students in teams only. also its the only way to learn how to apply your knowledge, building something new from scratch that has to work, so students build race cars and race with them, or micro-sattelites, or all kinds of robots, or flying stuff. Or pumpkin chunkers.

  • @Mechanikatt
    @Mechanikatt 12 років тому

    No explosions? Do I sense a glorious opportunity for my punkin' chunkin' railgun? Magnet power!

  • @cabrita309
    @cabrita309 12 років тому

    So I went onto the Science website and all it says is "Thanksgiving night @ 8pm".
    After doing so research on TV Guide's website I found it was 8pm EST.
    Punkin Chunkin 2012 will be on TV @ 8pm -5GMT
    Or Punkin Chunkin 2012 will on TV @ 1am GMT.
    Plan accordingly because it will be awesome.

  • @12Rman21
    @12Rman21 12 років тому

    I build a mini trebuchet in "high school" dutch version.
    it's base was roughly 25 cm high (10 inches) and it could chuck golf balls about 30 meters. incredibly cool to watch lol

  • @evildude109
    @evildude109 12 років тому

    We'll never forget you, State #1!
    Even when your misguided hippie ways have run you into the ground, you'll still always be kind-of average in our hearts.

  • @caterpillarraver
    @caterpillarraver 12 років тому

    I laughed a little too hard at 'for apulting cats'

  • @EvilFerret55
    @EvilFerret55 12 років тому

    I simultaneously think "What a plug for Science Channel" and "Wow, he's awesome, he's doing a plug for Science Channel!"
    No hate here, just thought it was humorous.

  • @TheSilentVictim
    @TheSilentVictim 12 років тому

    this. this is how you market a show.

  • @Notverygoodatall
    @Notverygoodatall 12 років тому

    Were you actually encouraging me to try make one of these at home or were you warning me against making one?

  • @nvoaiweur
    @nvoaiweur 12 років тому

    I actually built a small trebuchet for my school's homecoming day - launched a small pumpkin 125 ft.

  • @CorporalHicks8
    @CorporalHicks8 12 років тому

    I'm so excited.

  • @jckgoldness
    @jckgoldness 12 років тому

    Trebuchets are my favorite category in pumpkin chunkin

  • @scream835
    @scream835 12 років тому

    i love trebuchets, it has always been a dream of mine to build one, but it probably wont ever be big enough to compete for pumpkin chuckin

  • @Stardustchild01
    @Stardustchild01 12 років тому

    I can never support food wasting (that is this pumpkin launching event) but I do like the science behind it.

  • @LoogieV
    @LoogieV 12 років тому

    Is there a scishow on the difference between fermenting and rotting ?

  • @dimeboxtallone
    @dimeboxtallone 12 років тому

    Thank you for the information.

  • @AnotherPostcard
    @AnotherPostcard 12 років тому

    Hey! I actually do have a scale model of a trebuchet. Perhaps I'll go dust it off and have some fun in the hallway for a bit. :)

  • @AshkanKiani
    @AshkanKiani 12 років тому

    sqrt(-1) isn't a thing. i^2 = -1 is a thing. i is the solution to the equation x^2 + 1 = 0. People always state it wrong.

  • @thejerrymobile
    @thejerrymobile 12 років тому

    You know, I would say calling their machines "centrifugal" is a fair use, but only if it's referring to their resemblance to centrifuges, and not the imaginary force. Either way, I wouldn't want to stand very close to one when it was operational.

  • @Miskarr
    @Miskarr 12 років тому

    That's actually a very poor assumption these days with more and more people moving to UTC as the standard (in the US anyway, it was already a pretty good standard elsewhere). However, in this case we're talking about a US national television provider, so they actually means is 8pm Eastern and Pacific. (The show being repeated in their schedule.)

  • @SteevyTable
    @SteevyTable 12 років тому

    I can't believe that the machine that won the trebuchet category weighed less than just the counterweight of the second place finisher.

  • @AlyssaHawthorne
    @AlyssaHawthorne 12 років тому

    My school used to have a trebuchet competition for the freshman level class, but they replaced it when I was a freshman with a hovercraft competition, which is decidedly less cool than exploding fruits ;P

  • @technoserf_digital
    @technoserf_digital 12 років тому

    As someone who lives in the community where Punkin Chunkin is held, I can safely say it's our equivalent to the Super Bowl.

  • @MrSnickerssuper
    @MrSnickerssuper 12 років тому

    It means, that there are at least 30 people in this world, who imgaine trebuchet, when they hear the word "catapult"! They look just like ordinary people. They might be sitting next to you on the bus, performing a surgery on your grandma or looking after your children, when you're at work. And the worst is, that you'll never know until something happens.
    I don't know how about you, but this freezes my blood and I'm not sure if I'll be able to feel safe in this world again...

  • @maneatingcheeze
    @maneatingcheeze 12 років тому

    They have a no explosives rule, as long as the suction can be applied without the use of explosives it should be ok.

  • @PossumCuber
    @PossumCuber 12 років тому

    It's an imaginary force, which means that it just makes calculations easier when you want to look at an accelerating object as though it was stationary.

  • @_s_p_a_r_k_e_s_7615
    @_s_p_a_r_k_e_s_7615 12 років тому

    Yea I was thinking of a pump to create the vacuum inside the canon barrel and then a valve of some sort to equalise the pressure. The air rushing into the barrel would send the projectile a good distance I reckon!

  • @antizero100
    @antizero100 12 років тому

    IMA TRY IT AT HOME!!

  • @spudd86
    @spudd86 12 років тому

    No floating pivot trebuchets? They are more efficient since the weight falls straight down and the arm pivot point moves.... I guess it'd be hard to build a large one.

  • @Seamalicous
    @Seamalicous 12 років тому

    It's a sic show video, so if it's got hank in it you're on the right track, i just searched the channel, the video title is
    IDTIMWYTIM: Centrifugal Force

  • @BlahLab
    @BlahLab 12 років тому

    Omg, new goal as an engineer once I get out of school

  • @bradleymorgan8223
    @bradleymorgan8223 12 років тому

    New car to be thankful for :P

  • @Moonj64
    @Moonj64 12 років тому

    You'd need to find a way to magnetize the pumpkin but it would be awesome.

  • @Sergioluis93
    @Sergioluis93 12 років тому

    Catapults....apulting cats.....catapults.......ohhhhhh I see what you did there, Hank xD

  • @kurtilein3
    @kurtilein3 12 років тому

    sabots are not allowed? But in designs involving slingshots, or catapults, you can also build a nice pouch or basket for the pumpkin to sit in and be supported from more than one side. Maybe the rule is that only the pumpkin may fly, no parts of the machine, that makes a lot of sense also for security reasons. so why not a sabot that stops at the end of the barrel and doesnt fly out, like the cages used in cannons to fire humans? that could be legal.

  • @McC4rthy
    @McC4rthy 12 років тому

    My cat went crazy because of the cat sound at 1:25.

  • @tomledge1
    @tomledge1 12 років тому

    Anyone heard of a Coil gun? Basically a large slug of iron into the pumpkin, and a freaking' HUGE electromagnet

  • @goodman854
    @goodman854 12 років тому

    Holy shit me to, I'm glad I wasn't the only one. I turned around and was like "THE HELL WAS THAT?" lol Jesus.

  • @dogmeal
    @dogmeal 12 років тому

    You are all missing the point of this. It actually serves no real purpose to through a pumkin but it is a challange to do it. Check out Team Chucky. We have been having a lot of fun for 12 YEARS.

  • @feitocomfruta
    @feitocomfruta 12 років тому

    There are also two divisions as well: adult and youth. The youth division is pretty cool, seeing as the one I saw on "Road to Punkin Chunkin" was a trebuchet that they added a second weight to the rope, making the second fulcrum. The only danger is that they also showed that the second weight split a cinder block clean through on its post-launch followthrough.

  • @JTeixeira13
    @JTeixeira13 12 років тому

    I'm always afraid that the pumpkin is going to get stuck in the rope and not release until it is facing the audience.

  • @mandydax
    @mandydax 12 років тому

    Yay! I have a scale model trebuchet! I can try this at home!
    Now to find scale model pumpkins...

  • @BlueMathRecruit
    @BlueMathRecruit 12 років тому

    Hmm I didn't know it was coming up to thanksgiving, but Happy Thanksgiving anyhow!:)

  • @_s_p_a_r_k_e_s_7615
    @_s_p_a_r_k_e_s_7615 12 років тому

    wouldn't need an explosion, just a pump to create the vacuum and then a valve of some sort to equalise the pressure.

  • @t0ph4t1
    @t0ph4t1 3 роки тому

    Casually approach pumpkin
    Grasp Pumpkin firmly
    Yeet the pumpkin

  • @MyAJ91
    @MyAJ91 12 років тому

    Indeed!

  • @Jake9066
    @Jake9066 12 років тому

    Sad, but now I've gone and looked up coefficients of drag for pumpkins... how fast can you sling it without it caving itself in? I want to know!

  • @Telliria
    @Telliria 12 років тому

    Oh, UTC-5:00
    Thanks!