Hey there! This one was a lot of fun to make! Ever since the lawn mower video I've been wanting to do this, and I've been working on it all week. Thank you for those of you who support us on Patreon! You bring stability to my family's life. My goal is to be a light during this time. www.patreon.com/smartereveryday I know the world is a bit crazy at the moment. I wish you and your family peace and love. Spread the love and help others where you can. Look for the positive stories of people coming together in unity and try to amplify them. There's a lot of disinformation at the moment so if you recall what we learned together in the social media disinformation series, think twice before you share something! Warm Regards, Destin

“In the future, humor will be randomly generated” *WEEDEATER*

"In the future, entertainment will be randomly generated" "Weed eater"

As a weed eater, I am amazed by this video

I was sad when Mythbusters stopped making episodes. However, today I found this channel and feel rejuvenated! This is internet gold for science lovers like myself

"In the future, humor will be randomly generated" W E E D E A T E R

Trending now: Riots, rockets, and weedeaters. Edit: And a guide to being a pirate. Gosh, I love youtube

The neighbors: "What idiot tries to cut a wire fence like that?-" Also the Neighbors: "Oh, it's Destin. That makes a lot more sense."

Why did the chicken cross the road? *W E E D E A T E R*

I just spent 20 minutes watching a man cut grass with a slow-motion camera, and somehow I feel smarter. Thanks Destin!

"Weed Eater" Interesting. Where I live we've always called it a "Weed Wacker"

This channel is so awesome. We get to see things that we would otherwise never have the opportunity, but also because it is presented in a professional way as opposed to just a couple guys playing around.

Your happy curiosity (and excellent cameraman) is an endless source of satisfying videos.

I was surprised with the sound of the slomos, there's some very accurate sound design work there!

"The way you can tell I staged all of this...There is a recording go-pro in my shed."

I just found this video and LOVED IT! Have been searching for "how a weed eater works" & finally found the answers in this video. Will certainly be perusing through Smarter Every Day's library from now on. Thanks for making this and will check out the line shape slow mo you made. Well done!!

Honestly love the randomness sir keep it up.. physics in slow mo is all I need

Kudos to who ever did your slowmo sound effects!

Major props to whoever does the sound effects for the slow motion on this video!!!

I loved the stickers on the rotor and the curiosity test! Always an amazing job. Thanks

That slo-mo footage of the thinnest fence is incredible!!

My favorite thing about these tools is that in the south the name “weed eater” just becomes “weedeeder”

This video opened my eyes to the terrifying destruction ants see when I do my normal lawn work😂

“Guess what?” W E E D E A T E R

Thank you so much for testing it out against the chain link fence and the little pile, learned a lot!

I never imagined that weed eater lines were so floppy when you're cutting...this was beyond fascinating!

Before video: “What’s a weed eater?” During video: “Oh, it’s a weed whacker!”

Not my first time watching this, still amazed at the "spring back" speed of the grass

This went from a great one-off video, to the start of a legendary trilogy

16:04 is my favorite moment: the weed whacker thread hits the wire in mid-air and bends it to a U-shape. Pretty cool footage.

W E E D E A T E R - some future robot

Was just using a weed eater in the backyard and this vid answered all the questions I had in my head. 👍🏼

George Ballas, my deceased friend, invented the Weed Eater, in the early '70's. ALL trimmers are now known as Weed Eaters due to the "Kleenex rule". It is an amazing contribution to the world, thanks sir, RIP.

"In the future humor will be randomly generated!"

The sound guy is absolutely amazing. ^^ Those slomo sounds.

Your slow-mo sound effects are on point!

Hey Destin, love your videos! Kudos for the physics analysis on so much everyday stuff, I can't get enough of your videos. I was wondering if you can please make a video where you're analyzing the physics of a scythe compared to a weed eater. My grandpa taught me how to scythe, and while the learning curve is very tough, the efficiency and speed of a scythe is way better than a weed eater. I was just wondering how it looks from a physicist's point of view. Cheers!

Him: It's a spaghettification Me: sounds like science to me

Seeing the weed eater's "cable" disintegrate all the time made me realise that we have small plastic particles everywhere in our gardens.

I remember finding out about u like 6 years ago from someone else’s channel and ever since then I’ve been watching

"It feels more like science if we take measurements ", lmao, that line is golden Destin

"Why did the chicken cross the road?' "Weed eater"

"In the future all slow motion projects will be randomly generated" _"weed eater"_

Top video mate. Keep up the good work.

All those years of weed wacking and knowing all these things happen and how to prevent them, but never knowing how exatcly they happen. Super cool dude!

*Level 200 weed surrounded by Level 5 Grass Blades* Weed Whacker: "DIE CHEATER."

Every time I hear slow mo audio, I can’t help thinking about how there’s a guy that makes up all the sounds.

this is just so satisfying to watch...thanks again 🙋‍♂️🙏

That was cool to watch! Idk if its my end or not but I was hit with _more_ adds in that 15mins than I've seen looking at vids 4 times as long. It stopped me from checking more of your content out. I still liked cause the slow mo was mesmerizing lol.

I just want to say that the audio is amazing. The slo mo cam doesn’t record sound. All the sounds are added later and it sounds amazing.

"There's a lot if physics on how a weed eater works" The guy who just put a line on a spinning disk: 👁️👄👁️

I do lawncare for a living. And i was so into this video, and i was very intrigued to see everything in slowmo... until you got to the section of chainlink fence and now i just feel deflated 😂 i totally understand why you gave up on the wire fencing and let the vines grow. Biggest cringe when i saw the section of chainlink.

Destin these videos are great. I’m enjoying the landscaping videos you’ve done as of late. I’ve landscape for years and there some things that happen I’d love to see you be able to do. We use to have guys run over ground stakes in the ground with push mowers and I’d love to see what happens to the blade and the mower as it strikes the stake. Thanks for all your hard work on all your videos Destin

Me at 9pm: I’m gonna go to bed early Me at 3am: ah yes a w e e d e a t e r

We call this a “whipper snipper” in Australia...

I’m eight minutes in and I think this is the single most intriguing video I’ve ever watched. Thank you

Slow-mo audio is phenomenal 👏👏

Am I the only one who calls it a “weed wacker” rather than a “weed eater”

“Weed eater”, “weed whacker” nah mate down here in Australia it’s a whippa snippa, nuff said

This was great! Very informative, I really enjoyed your attention to detail.

Awesome video! I just had an idea while checking out some knives online. It would be awesome if you could make a video similar to this comparing different knife sharpening techniques (wet stone, pull through, honing steel, etc) with some close-ups of the knife blades after sharpening to help settle the debacle around pull-through sharpeners causing damage to knives and which steels chip more often, are harder to sharpen, etc

1:20 Neighbors looking over the fence: "Why's he talking to his weed eater?"

Destin:"95 thousands of an inch" Me from anywhere but the USA: yeah now I now exactly how thicc that boi is.

"How high is that weed eater" -- Annoying Sibling

Amazing! Just what i was looking for

6:22 “First, discombobulate”

Everything is so peaceful in slow motion.

When you run in slow motion like that, I find myself feeling really sad for the grass.

"It feels more like science if we take more measurements" - SmarterEveryDay 2020 I feel like this can be applied to so many things.

This is what UKposts was made for. Sadly, UKposts doesn‘t recommend informative videos like this one to me. I‘m so glad I stumbled upon this video, it was so interesting to watch. Thank you.

Awesome footage, thanks for sharing

I have all those fences on my property. The last one, rabbit fence, gives me the biggest issue and I use around my entire garden. Thanks for the help

Did i just watch 19 minutes of a guy filming his weed eater? Yes, yes i did.

"It's staged because the weed eater will start up immediately." Ignores the camera already in the shed. Ignores the go pro on the weed eater.

Dude your sound design is incredible.

Thanks for helping to satisfy my curiosity!

I really like the sound effects when cutting the grass in slow motion. Great work, whoever made those 👍

I eat weed too, I would have volunteered to be in this vid. Machines really do take our jobs :/

"Slow Motion Weed Eater" A.k.a. me having my third vegetable browny.

This was uploaded on my birthday and I watch smartereveryday every day

Thought he was talking about people eating weed when I saw the title

I’ve never heard anyone call it a “weed eater”. I call it a “weed whacker”, what do you guys call it? Edit: I’m from Connecticut, USA, as it seems this is a regional dialect thing

the sound is amazing during slow mo grass cutting

"It is like a spaghettification of the weedeater line...." I like your technical terms there Dustin.

Your sound effect guy need a Golden Globe, or Emmy or something. Amazing audio and video too!

Anyone else know it as “Weed Whacker?”

Yet another excellent video, thanks Are the sounds genuine from vid or fx added afterwards? They sound really cool. Also, in the UK they are generally known as strimmers although I believe that that is a brand name. Cheers

So, I was just starting the video thinking I could do other stuff while it was running in the background - I mean, weed eaters how interesting can that be?! Apparently I was wrong - I will now look at my own weed eater with renewed interest (and I want a high speed camera too). Keep up the good work Destin.

watching this video when my neighbour started to use his whipper snipper hahaha, btw thats what we call them over here in Australia!

Destin, could you do a tension-elongation test to see how much this material stretches before it shows a plastic deformation and until what point it will show an elastic deformation. With this info, the rotations per minute you could calculate the angle at which the plastic string is being pulled and calculate the forces that apply to the string. Furthermore you could measure the time it takes the strong to rotate around the fence, where it can be seen as immobile. With the rpm of the weed eater you can also calculate the elongation of the string. Basically with the phantom you've built a visual tension-elongation measurement device. Shear forces should apply in that case. You've basically got 2 points of failure at least: 1 the impact weakens the plastic string. If the string isn't being broken by the impact, the smallest diameter of the plastic string no carries the weight of the weeed eater pull. After lowering the diameter, tension with a sheer force is being built up until the elastic deformation changes into a plastic deformation which leads to material failure. Another potential weakening of the string lies in the fact that the string is curled up and therefore shows inner tensions. As we know, inner tensions do get released when heat is applied. This heat is created upon impact with the fence. Basically you use the impact of the string to straighten it out a little and release some of the material tension. There are so many more things I have on my mind right now but due to me being German, it is hard to explain everything on my smartphone in a UKposts comment. Greetings from a German mechanical (Diplom-) engineer in the field of material science, compound technology and damage analysis. If you want a super interesting topic, I can hit you up with a machine that I've built that replaces a multi-million dollar machine with something that can be self made for 50 bucks. It's for measuring the surface tension of EVERY surface or surface coating. 😁

‘ it’s more scientific if I take measurements’ Also him ‘ it’s like a spaghetti-fication’

Wow I love when the weed eater matched up with the frame rate so satisfying

"In the future, humor will be randomly generated!" -Larry the Cucumber

"95 thousandths of an inch" Most of the world: w-what?

"Thousandths of an inch" Sorry. I dont use eagles per burger³. What is that in mm?

The sounds I heard during the slo-mo…kinda satisfying tbh

My buddy is a weed eater but, he calls them gummies.

I used to go to a tech school where I learned about metalworking, and one of the teachers said something interesting that stuck with me forever: Everything's a liquid if you're going fast enough. Now when he said it, he was referring to croumple zones in a car, and how that deformation takes a LOT of energy that is then NOT transferred to the passengers. At about 11:00 you can see the same principle in action. When that nylon line wraps around the fence, it looks as if it turns into jelly which then doesn't have the structural integrity to keep it together, and the end flies off.

Crazy how it wraps around the fence and then unwraps in such a short amount of time.

"The perfect username doesnt exi-" *WeedEater*