Why Snatch Blocks are AWESOME (How Pulleys Work) - Smarter Every Day 228

  • Published on Dec 5, 2019
  • Get your first box of KiwiCo free by going to www.kiwico.com/smarter
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    If I did this right then these are Amazon affiliate links to purchase a snatch block. (I have no idea what I'm doing)
    $22 - black 8 ton - 5 stars - amzn.to/2DMR4s8
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    We discussed Snatch Blocks on this episode of the No Dumb Questions podcast:
    If you'd like to 3D print the Snatch Blocks and pulleys we use in this video they are here: www.thingiverse.com/thing:4022579
    Read Plutarch's account of Archimedes:
    The wikipedia page on Block and Tackle is really good:
    I thought this was a great video about why you should put blankets on your winch cable: thexvid.com/video/gPba-34ARZY/video.html
    Chris Hadfield is a veteran Canadian Astronaut and a great friend of science. He engages the public often and is a great follow on twitter: Cmdr_Hadfield
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    Jeremy Fielding has his own TheXvid channel which you can enjoy here!
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  • Science & TechnologyScience & Technology

Comments • 11 421

  • SmarterEveryDay
    SmarterEveryDay  Month ago +2205

    Snatch Block!
    I want to take a moment to thank those of you who support Smarter Every Day on Patreon. I'd also like to point out 2 things about this video.
    #1. You'll notice Jeremy Fielding is in this video. He's the "Contraption Fabricator" that's started working with me now because of your support on Patreon. He's a great designer, father, and friend. You'll be seeing more of Jeremy around thanks to those who support at www.patreon.com/smartereveryday/
    #2. If you'd like to 3D print the Snatch Blocks and pulleys we use in this video they are here: www.thingiverse.com/thing:4022579
    #3. I really enjoy KiwiCo and I think you will too. I got them as a Christmas gift for my children years ago, and it was a huge hit. It was after that experience that I reached out to their team and asked if I could advertise for them because of how good it was for our family. I think you'll enjoy it too. www.kiwico.com/smarter
    It was 3 things... I ended up pointing out 3 things.

    • Rodtheo 00
      Rodtheo 00 4 days ago

      Your children have grown so much

    • russel finch
      russel finch 8 days ago

      SmarterEveryDay you know what’s amazing ?....hands !
      You can smash rock with them with a hammer,also pick up rough rock,grab hot items ,Stroke an animal,feel the slightest bit of grit on a surface,punch,massage....all with hands!

    • J Jay
      J Jay 18 days ago

      This was the longest add ever

    • Rimantas Liubertas
      Rimantas Liubertas 19 days ago

      @melanieenmats you are right. Gears and pulleys are just more sophisticated levers. And with lever you lose distance but you gain force.

  • loridergmc91
    loridergmc91 27 minutes ago

    @7:10 Those are Man hands

  • Chris Kratochvil
    Chris Kratochvil 3 hours ago

    im trying to make a cure for cancer

  • Ggamer1234
    Ggamer1234 5 hours ago

    If I had to visit America, Alabama would be one of my go-to states

  • Emre Demir
    Emre Demir 7 hours ago

    you are a cool father

  • Jim Pyre
    Jim Pyre 10 hours ago

    Awesome work!!

  • I dont wanna use my name

    Pulleys and levers

  • BucWiLD
    BucWiLD 21 hour ago

    Husband: Snatch Block!!

    Wife: You Pervert!!

  • RainAngel111
    RainAngel111 21 hour ago


  • Christopher Sines
    Christopher Sines 22 hours ago

    idk why but the example at 4:20 really made it click for me

  • The Sydney Stone Company

    Improve your grammar. Try not to say “got”.

  • Torque Monkey
    Torque Monkey Day ago

    not to be confused with a snatch box! you will end up on the wrong web page.

  • Dario Ampuy
    Dario Ampuy Day ago

    so... kiwico is the sponsor?!?!? i thought it was SNATCH BLOCK!!!!!

  • Greg Diefenbach
    Greg Diefenbach Day ago

    Does Smarter Everyday have a sponsorship relationship with MagellanTV?

  • John Doe Ent.
    John Doe Ent. Day ago

    What the heck is a snack block

  • marc p
    marc p Day ago

    I swear I thought u were about to say this is an ad for snatch block!!

  • ge200099
    ge200099 Day ago

    Everybody who doesn't know the basic principles of physics like this does not earn their middle school degree

  • d duji
    d duji Day ago

    Amazing video ! Educated at age thirty lol . Definitely going to check out those kits . Is there any of those kits for ages 3 + I would like to buy some for my kids

  • fartswallower666
    fartswallower666 Day ago +1

    I put connies on to jakkit so I no make no mess

  • MIGHTY Space Beann

    I want to make a joke but the kids are watching

  • Aussie Aussie Aussie

    I see 3.3k thumbs down, which is hard to believe, but then I realise the ratio matched the amount of people I see in society that have purple/blue/pink hair and all of a sudden it makes sense.

  • Jacob Butterfield

    If I hadn't watched this video our company would have been two generations of moving generators like jackasses.

  • Mitchell Schock
    Mitchell Schock Day ago

    Life lesson: Get snatch Block

  • Grump Man
    Grump Man 2 days ago

    Destin..... this is the only channel i dont mind promotions..... dont stop Destin.... you are inspiring me to Be Smarter Everyday..... Thank You.

  • Thomas Gauna
    Thomas Gauna 2 days ago

    Can you film in slow motion and explain why a soda bottle explodes when shooken up, what makes it so challenging to open up a shaken up bottle?

  • Erik Kalifornia
    Erik Kalifornia 2 days ago

    Destin, is it exact, 2x force for every rope pulling up? I would imagine you would lose some of that force in the friction of a pulley. I picture your small hands on portion of the video, using like 16 snatch blocks. If you put 2 lbs of pull on the beginning, would you still get 32 lbs of lift? I would think some of that pull would get lost in the friction?

  • Nitish Bishnoi
    Nitish Bishnoi 2 days ago

    Was that Mark rober in the picture?

  • Luis Ramirez
    Luis Ramirez 2 days ago


    VALIS-FPV 2 days ago

    That dude in the truck had twice the finger size than Destin..

  • Steve Collins
    Steve Collins 2 days ago

    Give those kids some gloves!

  • Marc Drummond
    Marc Drummond 2 days ago

    Great stuff, thanks

  • eltouristoduo
    eltouristoduo 2 days ago

    fun topic! can go even deeper. Try to consider the implication of friction. The friction of pulleys and gears seems to sort of be inherently tired to the geometry, or I could be wrong, that's the fun thing about the subject, it can be counter-intuitive. But someone surely knows, if pullies had no friction would rope tension still decrease? Well it seems it has to because of the geometric leverage. I know the tension decreases with 2nd and more pulleys, but I havn't quite modeled it in my mind enough to see how that relates to the idea of friction and tension changes through a system. The fun part for me at the moment is trying to conceptualize how hypothetically frictionless pulleys would still decrease rope tension. Because for me intuitive if there was no friction how could tension be changed? Probably not that hard really, I will maybe edit my comment if I figure it out without cheating any time soon lol. But if anyone wants to tell that would be fun too. I think I already figured my question out years ago and forgot too, that's a common thing with me lol.

  • The_official_kiwi
    The_official_kiwi 2 days ago

    I like the idea of kiwi co I just wish it was based in New Zealand the land of the kiwi bird and why does everyone think NZ is part of Australia because kiwis (the people) have a rivalry with aussies and we are NOT the same

  • J Pweek
    J Pweek 2 days ago

    "Snatch BLock helps you make friends" - If I use it to make female friends will I be able to make friends with multiple women by expending the same amount of effort to male friends with one?

  • plopsplipspladoodle
    plopsplipspladoodle 2 days ago

    I'm a huge fan and I say this with love but Easy on the the yo dogs Dustin. It's appropriative.

  • JO
    JO 2 days ago

    Who else clicked thinking snatch blocks were the female version of c@ck blocks?

  • milo piva
    milo piva 2 days ago

    You might wanna consider changing your tires bro

  • Softail77us
    Softail77us 2 days ago

    When I was a kid we didn't have winches or come-a-longs., We had to use pulley systems with rope when a bike or dune buggy got stuck. It's great to see engineers with a sense of humor! I actually laughed. I want a snatch block key fob to clip on my belt loop. Do you have any? Thanks for the video.

  • SpaceCadetLaC
    SpaceCadetLaC 3 days ago

    Snatch Block!

  • Colin MacKenzie
    Colin MacKenzie 3 days ago

    Thank you for your posting! I had totally forgot about the compound block, thanks!

  • Colin MacKenzie
    Colin MacKenzie 3 days ago

    Pulled that truck with that thread !!!

  • camaro75RI camaro
    camaro75RI camaro 3 days ago

    replace the bald tires on the jeep will stop from getting stuck....lol

  • Dave Rice
    Dave Rice 3 days ago

  • Saket Vaibhav
    Saket Vaibhav 3 days ago

    Omg. I love this!
    I have so many questions though!

  • Tom Burgess
    Tom Burgess 3 days ago

    I'm a sailor and this is all I think about when I'm pulling the sheets

  • AsH Watchoutforthattree

    Take the rope, in tension. Insert the pulley, thereby halving the resultant force. Insert another pulley,... half again. Pulley= tension/2.

  • RGF
    RGF 3 days ago

    Your video genuinely made me laugh for the first time in over a month. Thank you.

  • Tazzspaz
    Tazzspaz 3 days ago

    Oh I don't need pulleys. I just need lots of kids.

  • JeffWilson 9919
    JeffWilson 9919 3 days ago


  • Tomas Walsh
    Tomas Walsh 3 days ago

    I think I need to invest in some snatch blocks now 😁

  • Juneao Alfred
    Juneao Alfred 3 days ago

    it does make me think how human in the past lift a tons of Massive Stone Blocks.. hurmm..
    but the pyramids is way behind before pulley is invented.

  • Bonecross
    Bonecross 3 days ago

    I’m sharing this with my robotics team. Look up team # 7607 from FRC

  • ORagnar
    ORagnar 3 days ago

    Astronaut Hatfield! The guy who sang "Space Oddity" while on the International Space station!

  • wayne nahuy
    wayne nahuy 3 days ago

    That is a good video dude...thanks.

  • Naldoron
    Naldoron 3 days ago

    Ouch. Those are some bald tires on that jeep

  • Corbeast Tracer
    Corbeast Tracer 3 days ago

    Anyone else notice Mark Rober in the background?

  • ussenterncc1701e
    ussenterncc1701e 3 days ago

    Work is equal to the force applied, multiplied by the distance across which it is applied. W=F×d
    By the work kinetic energy theorem, the work done on the system is equal to it's change in kinetic energy. W=∆KE
    In a conservative system, for a component that itself does not lose or gain kinetic energy, the work done on that component is equal to the work done by that component. W_in=W_out
    If the component is moving a different distance at one end that on the other, then the force associated will be different, since the work is the same. F_in×d_in=W_in=W_out=F_out×d_out
    This means the output force is equal to the input force, times the ratio of distances. F_out=F_in×(d_in/d_out)
    It is this ratio of distance that is the mechanical advantage. MA=d_in/d_out
    This is how mechanical advantage works for any system: pulley, lever, gears, etc.

    • ussenterncc1701e
      ussenterncc1701e 3 days ago

      The calculation requires distance, which means the things have to be moving... but what about things that are balanced, like hanging weights in a pulley system. This one's a tad more complicated mathematically, but it basically works out the same way.
      In a conservative system, the potential energy function is equal in magnitude to the work function, with respect to some defined zero energy position. Assume the mechanical components, like the rope and pulleys, doesn't add or subtract energy from the system (ignore miniscule amounts of stretching and friction). Each side of the system (input and output) has an associated potential function.
      A system will reach equilibrium when the total potential energy of the system is minimized. Since the potential energy functions are based on the work functions here, the balance point of the system will be based on the ratio of distances from the zero potential points, and the ratio of supported weights which balance is the same as the mechanical advantage.

  • DigUpSkulls
    DigUpSkulls 3 days ago

    Who goes off road with bald tires?

  • Bill Cosby
    Bill Cosby 3 days ago

    Are you an engineer. If so what branch. If mechanical i would like to ask a few questions as im a senior in highschool going into mechanical

  • bannockking
    bannockking 3 days ago

    Well done- I taught this in grade 4 science and wish I had your video.