1st place Mousetrap Car Ideas

Science your way to the blue ribbon.
Check out Al's website if you want stuff to build your own: www.docfizzix.com/
10 quick, practical build tips: www.dropbox.com/s/x35qfah75x4...
MERCH-
By popular demand I have shirts now! I picked the super soft, high quality shirts and make $0 on all items which is why they are priced so handsomely :)
teespring.com/stores/markrober
MUSIC-
0:01- Arrow- Andrew Applepie- andrewapplepie.com/
1:06- Q- Blue Wednesday - / bluewednesday
4:43- Almost Original- Joakim Karud- / joakimkarud
5:47- Ceral Killa- Blue Wednesday - / bluewednesday
7:37- Berlin- Andrew Applepie- andrewapplepie.com/
12:24- Dizzy- Joakim Karud- / joakimkarud
14:24- Too Happy to be cool by Notebreak- / dubstep-too-happy-to-b...
Summary: To understand how mousetrap cars work you first need to understand the concept of mechanical advantage. There are 4 principles to win with a long distance car:
And 4 principles for winning with a speed car:
Finally, we visit the Science Olympiad to see these principles in action
PLEASE CONSIDER SUBSCRIBING: tinyurl.com/MarkRober-Sub
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I make videos like this once a month all year long while supplies last:
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TWITTER: #!/MarkRober
INSTAGRAM: / markrober

[@danieljensen2626]

When we did this in highschool our speed/acceleration contest was only over a meter, so I just used the mouse trap to catapult my car over the finish line.

[@kyleguajardo]

Modern problems require ancient solutions

[@a_stone]

*yeet*

[@James-tv2bm]

How’d that work for you

[@danieljensen2626]

@@James-tv2bm Great, I won easily. It was so fast you couldn't really hand time it properly. Of course it rarely landed on its wheels so it wasn't any good over a longer distance.

[@fieldmarshal7298]

That's actually smart

[@PotatoJet]

The internet needs more people like Mark Rober. KZbin should give incentives for NASA employees to become creators.

[@sunglassesdude4819]

Potato Jet my science teacher is a scientist with the opportunity rover. Its cool because there is a club thing where we get to work with nasa with it. However that teacher isn’t very nice and I have been yelled at for doing what I was supposed to be doing a couple times. One specific instance of this was with force vectors. She asked the class how to do them without telling us first. I connected it to vectors which we saw in geometry but I was yelled at to stop doing geometry because this is science. She then explained how to do it and it was geometry... I wouldn’t like to see her on KZbin tbh.

[@pasghikhami1342]

NASA employees should stick to being important

[@sunglassesdude4819]

Pasgh ikhami getting to Mars is important but following your passion and having a life is also important

[@goblingamer606]

Has anyone ever tried using this same concept to propell something like a paper airplane? Doesnt necessarily need to be made out of paper because thats flimsy, but i think that would be a fun idea too

[@jamesg265]

Not all NASA employees are like him they are mostly old

[@robertboyd2223]

Can you imagine how lucky some future kid is gonna be to be able to call Mark Rober their physics teacher??

[@bwbacthe2nd589]

omg now thats something mind blowing

[@Rentaro_dev]

yes,I wish we could study again

[@chriswilliamson806]

Could you imagine the school board looking at what he would want to do? Lol

[@robertboyd2223]

@@chriswilliamson806 so today we’re gonna catapult an entire cafeteria

[@andyrockism]

Well we can also call him our physics teacher too. Just for us he teaches us here on KZbin as oppose to a classroom.

[@superblooperboss1638]

no one is talking about how mark was outside IN THE RAIN for a bit just so he can explain the topic he was on. I want him to be my teacher.

[@itzsophxo8154]

The way Mark explains physics is not only easier to understand than school ever taught me but he makes it so much more interesting

[@JupiterKnight]

chicken nuggets

[@rockhopper6316]

Yes exactly

[@wren7195]

@@rockhopper6316 What scares me is "go dominate the competition" means you won by like 1.5 mm

[@LawrenceLS]

@@JupiterKnight chicken numgies

[@rockhopper6316]

@@wren7195 yea lol

[@jean-philipebouvier6932]

- Dad, why is my sister called Rose? - Because your mother loves flowers. - Oh ok, thanks dad.. - No problem, Mechanical Advantage.

[@BlitzBodyBeats]

*D E L E T E T H I S C O M M E N T*

[@WarmongerSlays]

@@BlitzBodyBeats Why

[@TheDogBasti]

@@WarmongerSlays some man want to watch the world burn

[@croccroc4000]

No problem. *communism*

[@order66pizzas]

EEE EEE no problem democracy

[@josephdreamz]

It’s almost 2022 and I’m still enjoying this video, I mean the way Mark explains engineering is so amazing.

[@DUDEFISH_]

yes ikr he also inspired me to make a montage in my video

[@Dragon-Slay3r]

Welcome to Joseph's nightmare

[@limeedhot]

It's almost 2023 and I'm still enjoying this video, I mean the way Mark explains engineering is so amazing.

[@megagatlingpea2322]

its already 2023 for me

[@itzpogboy]

Hello its 2024 buddy wake u0

[@luigio8484]

this has sat in my brain for 3 years and has silently been supporting me through my physics classes. Thank you.

[@Spock1777]

I wish Mark was my physics teacher...

[@alexbaker9996]

That would be amazing class would never be boring

[@owenmarsh1985]

You and everyone else. Move to Denver Mark

[@nataliaray7315]

I know!

[@Wintercourse]

My Physic teachers failed me with a 59.6 in high school. I went after school everyday to work on crap because everything was group based. My friend didn't know anything, and stoner girl didn't show up. The workload was added on as the first group finished, so it was impossible to actually keep up. Two years after I graduate I found out he was sleeping with a sophomore girl and was caught and he fled the country....Yeah I wish this guy had been my Physics teacher.

[@Wintercourse]

@@neb4587 I couldn't get full credit because I didn't have group members to finish their stuff. Yeah he was a creep.

[@Mo-dp6rc]

Hey! That's me at 12:50 ! Super cool to see a Science Olympiad event highlighted on your channel! It was great to meet you and talk about my car.

[@nyensimpfenderfer4980]

Seriously

[@Yeujer]

SCIOLY IS LIFE

[@RSpudieD]

Sweet! Congratz!

[@db_d.a.b651]

just finished my SCOILY event at 4:00

[@waterlubber]

>TFW States is already over I didn't work on my teams mousetrap. I did 3D print the bearing mounts though. I think it actually got first at states.

[@_reddical_5813]

in my 8th grade science class we are actually doing something where you can either build a lander or a rover, no electricity and stuff like that. I had the egg drop thing as an idea for a lander and this for a rover and I'm super excited to test both out and see which one is better.

[@resentfulsidecharacter3713]

So what happened

[@giusepperesponte8077]

I think I just found a lifetime hobby. Every science teacher I’ve ever had said I possess an extremely intuitive understanding of physics and this seems to be a perfect application of that. Just seeing this video makes my mind go crazy thinking of all the ways I could attempt to improve the design. I wonder if you could devise an equation that could predictably determine what the optimal ratio of mechanical advantage for a given car would be, accounting for factors like weight, wheel diameter, coefficient of friction on the wheels, axels, and every other moving part where friction is present. Obviously there’s a perfectly optimal car that could be made if you could fully understand all these factors and that’s what is most alluring to me.

[@twobladedswordsandmauls2120]

When mr. Rober is a physics teacher to almost 10 million people and doesn't realize it.

[@sentientmouse5332]

On-Plot-Point physics, engineering, math, science, medical information, problem solving, and FUN!!!

[@Ivara4226]

@@Shrin3Iroh 10.2 mil

[@salteds0cks]

@flowazx 10.3 mil

[@adi-sngh]

@@salteds0cks 10.4 mil

[@notoctoboy5703]

*don't

[@jonathanhuang6156]

1:36 Mark: But I could lift 10lbs 50 times. *Uses a 12 pound weight*

[@zestymushr00m85]

Also said his car weighed 500 lbs soooooo

[@zestymushr00m85]

YoYO Semite which is my point, the weight was also an example to keep math simple

[@arzonfyre8421]

@@zestymushr00m85 it was only one corner of the car being lifted. Which he estimated at 500 pounds

[@zestymushr00m85]

Guys he was just giving an example🙃🙃 I’m agreeing with Jonathan Huang just using the car weight example

[@GamingWO-]

YoYO Semite what, where’s the acceleration? You have distance.

[@kennethborden929]

I never did this as a kid but being an auto mechanic now I got a huge kick out of this video! Made me think about the mathematics of transmissions and differential final drive ratios. Super fun keep up the great work!

[@EbenVisher]

Wonderful! From your intro, I thought you were going to make your own design, better than any other. Even so, I enjoyed the lesson.

[@luxraylloyd7932]

I learned more in the first 5 minutes than a whole semester in high school

[@ferretrevelvent6793]

Sad but tru

[@marylawrence2218]

Maybe short term, but learning is (or should be) based on retained understanding and application.

[@asbuilt0017]

Mary Lawrence yeah you are right but you can re watch the video

[@avitus2]

I feel this. I just wish I had a physics teacher in high school that didn't play favorites to their special projects group (in this case, the solar bike team). If you were on the team, you got her complete attention, if you weren't then tough cookies read the book and too bad if you don't understand it from reading the chapter.

[@luxraylloyd7932]

@@avitus2 If you have a teacher that has favorites, that sucks.

[@kinju6227]

“Thank yo-“ Niece: ** *Slaps Ice Cream* ** “O WOAAH”

[@Yehe13]

so rude

[@emmaly8993]

Trenity R salty slap

[@rapiintheskyy3585]

that was cringe

[@Sillimant_]

@@Yehe13 it was scripted, you can see they love him

[@Sillimant_]

@@rapiintheskyy3585 it was part of the joke, much like your continued existence

[@LuckyBoi-vg3ch]

The way he explained physics is so much better then the 9 years of science class I've taken

[@rizzthespacething8823]

nerd!

[@ItsJayTho]

Press F to pay respects to icecream

[@fluxsneaky6063]

Jayden Games bruh im eating some rn 😂😂

[@Naat.ee12]

Uhhh, im on phone.... 🙄

[@maazurrehman9998]

F

[@520gamingandvlogs9]

F

[@ItsJayTho]

@@Naat.ee12 just press reply then SIMPLY press f :)

[@kartikgohansiwach]

If he was a teacher at my high school I would never leave the class

[@MJaneth]

Or fail

[@tychus7]

@@MJaneth no i would fail so i would have him again

[@olerius1235]

Bruh so u skip wooowwwwww

[@olerius1235]

@@tychus7 that's not a good thing

[@andycunningham1731]

Ditto

[@bonook8]

I first did this project in 1987 during my student teaching in Industrial arts. We used two mouse traps which allowed options on how to best utilize them. I continued this project for the next 12 years as an engineering project in Drafting class. Best run was 437 feet in a 12 foot wide hallway so straight tracking was important. The best wheels were 33rpm vinyl record albums. I didn't invent this project and don't know it's origins.

[@ttimmythy]

I used this video back in seventh grade over the course of 4 weeks to build a fully optimized (realistically) car. Sadly the pandemic hit and I never got to see how far it went.

[@Shrew-22O1]

Mark: “I want to be a physics teacher later on” Every subscribers: ^ *has been learning from him since the beginning* ^ 👀

[@HighTiered]

Naruto X Hinata k

[@fabianklevenz4800]

i was expecting a mouse trap that catches a mouse and drives away with it

[@gloriaroma-sandiegorealest4037]

Whisper voice: lol, me too!

[@greatacarrillo]

Same

[@SSruh]

Hit & Run

[@gamingwithluke5592]

Same

[@shmup6955]

Ha

[@danielliang2946]

Hey Mark! Nice Video. I wanted to point out that, at 2:03, mechanical advantage doesn't necessarily equal number of pulleys in all pulley systems. This is because fixed pulleys (pulleys which don't move while the load does) have a mechanical advantage of 1, while movable pulleys (pulleys which do move while the load does) have a mechanical advantage of 2. This is why, in your case, the pulley system had a mechanical advantage of 4: the specific arrangement and positioning of 2 movable and 2 fixed pulleys allowed the system to have a mechanical advantage of 4. However, it is important to note that this doesn't happen to all arrangements of 4 pulleys, as if you were to line up 4 fixed pulleys, you would still get an mechanical advantage of 1, not 4. Thus, you cannot say that mechanical advantage equals number of pulleys in all pulley systems. Instead, you could "split" up the tension along the ropes of a pulley through a diagram. Here's the procedure: you first can imagine that you are holding the end of whatever pulley system you are trying to solve with such a force such that the system is in static equilibrium. Next, you can split the tension caused by the force of the load among the ropes of the pulley system. The key to remember is that each unbroken piece of rope will have uniform tension along it. Finally, you keep splitting the tension all the way until you reach the rope which you are holding. The mechanical advantage of the pulley system will simply be the the load force divided by the effort force, which is simply equal to the tension in that rope you are holding, since the system is in static equilibrium. THAT is the correct way to solve for the mechanical advantage of a pulley system (sorry if I explained it badly). Additionally, I wanted to point out that, at 2:08, mechanical advantage of an inclined plane does not equal the ratio of the length to the height unless the inclined plane is just flat and not inclined, in which case I wouldn't really call it an "inclined" plane. But instead, mechanical advantage of an inclined plane is equal to the ratio of the hypotenuse to the height. This can be derived like this: the load force on the inclined plane is simply equal to its downward force caused by gravity, which is simple equal to f = ma = mg. We can split this force into its x- and y- components, which we can then deduce that the force of the load in the direction parallel to and going down the hypotenuse of the inclined plane is equal to mgsin(theta), in which theta is the angle of the elevation of the inclined plane. This means that, if we were to push the load up on the inclined plane with force mgsin(theta), then the system would achieve static equilibrium. In other words, the load would stay in place. Since we know that mechanical advantage is defined as the ratio of the output force to the input force, that would simply mean that the mechanical advantage of the inclined plane would be mg/mgsin(theta), as mg is the output force in this case and mgsin(theta) is the input force in this case. This simplifies to 1/sin(theta). This is simply equal to the ratio of the hypotenuse to the side opposite angle theta, which in this case is height. Thus, mechanical advantage of an inclined plane is equal to the ratio of the hypotenuse to the height.

[@penflex8997]

I’m to lazy to read gib a summary

[@FluffyDragonDrawing]

you are absolutley correct but remember mark is tying to simplify these things so people with zero knowledge can understad. he would have lost a LOT of people hadd he tried to explain all of that. hence why he ust suggests we do it ourselves

[@penflex8997]

@@FluffyDragonDrawing summary cool waited awhile

[@nika.5223]

This is a fantastic video, but I will say that in 8th grade my best friend and I were tasked with building a mouse trap car that didn't use a pulley system as a sort of "bonus" project. We built a tiny car, launched it with the mousetrap, and won the competition for our class. It believe it went almost double the next best vehicle's distance, and I personally built the 2nd place car.

[@ChaoticCrimsonX]

Mark: "A little bit of water spills out every time" Also mark: *Purposely misses cup*

[@prinzeszelda3650]

He is Like realy Bad at pouring

[@prinzeszelda3650]

@The Demon Under Your Bed • 3 years ago thx

[@umbraltears3434]

you should see liam thompson pour liquid

[@manuelpatino5879]

Mark: Talks like a smart person Me: I don't know what you're talking about, but it seems interesting

[@richardlooch2109]

the winning model is the one where the mousetrap lever activates a electric motor...

[@bigandfluffy2000]

i dont watch because its relevant, i watch because its entertaining...

[@fqidz]

True

[@Aciey]

me to

[@yeahyou7827]

Same

[@Tfifiuyiugtjfytyftj]

I agree with you

[@literallybooby2737]

JoeSloppyJoe I watch it for both

[@kjteitel]

Great video, small thing, had this same mouse trap challenge in my junior year in high school physics class in 1989. It was a great learning experience! Don't remember who won, we had an incredible teacher, just like Mr. Karud. Big props to him for his dedication to his students!

[@bonook8]

You are correct. I taught Industrial arts and did this beginning in 1987. I did not come up with the idea and don't know it's origins but I do know it did not begin in 1991.

[@notsiddhi2820]

1:43 my guy literally standing in the rain for science.... +1 respect

[@lavissebruh3144]

Breaking news: Worker in NASA go to school to totally annihilate kids in mousetrap car race

[@MineShineMarshal]

Yuen Kik Li former

[@chaosincarnate7304]

Correction: Former Worker at NASA went to a school to totally annihilate kids -in mousetrap car race-

[@kirtan__]

This was for the mousetrap vehicle event for Science Olympiad. Teams spend forever on designs so that’s why Mark did not show the design the team he was visiting was using. They were actually going to nationals and why would Mark leak a teams design if they’re going to Cornell.

[@cogn0765]

lol

[@lunaabney6312]

you would be a GREAT science or tech ed teacher

[@carsenwhitmore1559]

Or a physics teacher

[@iamanartistbutcantdraw4454]

Gavin D'Souza no search anonymous

[@xxfluffydogxx7026]

Oh I'm a anonymous member too

[@xxfluffydogxx7026]

@@Vertense do you even know anonymous?

[@peggzmugga1811]

Hi

[@daneykev]

WOW so nicely done. Wish I had this when I was teaching mousetrap cars years ago.

[@t-6273]

When I was in HS I built many of them. Our rules wouldn't allow for any modifications to the trap and had overall dimension regulations so it could only be so large. Mine would go the full length of the basketball gym at the school. Great memories. Cool video

[@DarthBil1]

I laughed so hard when your niece knocked the ice-cream out of your hand.

[@duckyfam9012]

DarthBil1 IKR LOL

[@Vic_Inso]

Ows talaga ba?

[@_Grimm333_]

Same

[@gal3win213]

@@Vic_Inso filipino?

[@lamp1739]

Wait when?

[@theevauwu7853]

Lesson of the day: don't make a bet with mark

[@lucron12]

Yes that is so true

[@lucron12]

You’re really correct

[@lucron12]

Im just doing this so it Will look like People comment

[@lucron12]

: )

[@lucron12]

You welcome Eva Slyva

[@mdfyui8000]

This was a fun high school competition back in the day. I still keep my car as a momento as it's just such a satisfying design - the comp was a speed one and we took the win. The car we made was four wheel drive and light - the four wheel drive was chosen to maximise the traction availability along with tricks to manage traction and energy. We had hypothesised about friction and traction in class, none of us had real karting or racing experience at the time but this was certainly a time where it became apparent. The result was fast enough to be challenging to time.

[@thomasfplm]

In a design class, we had to make a bridge using two pieces of ondulated paper (it had a standard size, but I don't remember anyone) and one roll of masking tape each team. It would be placed linking tow tables 0,5m apart and then we would place 1L bottles over it to see what design would hold more. Many bridges had problems with tortion, or with the paper bending, but my idea avoided those two problems and was able to hold all the bottles available (about 20 bottles) and we started adding other stuff.

[@Frank_142]

If he was my physics teacher I would skip other classes to go to his class

[@turtles8930]

Future Fire ikr

[@nicoliftsz]

Same

[@igorchurilov5611]

Future Fire he’s my teacher😂

[@chillnub641]

Same

[@SupremeLordGeek]

Same

[@ldbeastmode0689]

Me: This is boring, I can’t wait till schools out *Schools out* Me:*watches educational videos for fun*

[@DreidMusicalX]

Learning is never over.

[@OeshenNix]

Hey thats me

[@mamabear9467]

Same bro I watch them all the time

[@ndzd9941]

This is me I used to just binge watch every large educational channel, then I stopped and now I'm finally getting back into it

[@ldw0696]

Yea in quarantine I'm out of school but I wish I was in it

[@refundy5873]

The satisfaction you get when you learn about the stuff he’s talking about

[@aarushprasad4493]

the longer lever arm also increased the amount of string pulled, and the smaller of the ratio of axle to wheel makes the rotations let the car go further

[@nwiiho4215]

Mark: Talks like a smart person Me: I don't know what you're talking about, but it seems interesting

[@azaanammar3841]

True

[@pizzathegamer8249]

shungite

[@nwiiho4215]

@@pizzathegamer8249 J O I N U S

[@pizzathegamer8249]

@@nwiiho4215 SHUNGITE

[@casvandelaar8671]

Same man I feel you

[@megamaz108]

Can you believe I had to watch my favorite youtuber for homework on my Mouse trap car?? :O

[@SuperMaDBrothers]

megamaz dang bro really

[@CJDavis-js7mr]

Me too lol

[@ttv__btw__yt4835]

K

[@LeFishee]

Mark Rober, im making it, the current best for my school is 33 feet, thanks mark, we will win

[@HALO-nv1xv]

The fact that I saw this video when it came out and just today I was assigned to make a mousetrap car in my high school physics class.

[@samuelgunter]

Same. This is the optional assignment this quarter that counts as a major grade and my teacher will give out a ton of bonus points for furthest travelled, nicest looking design, etc.

[@HALO-nv1xv]

@@samuelgunter Its not optional for me but im sure our assignments are very similar regarding the rules and such

[@amauryd]

When you learn more in a 15min video then in 13 years school

[@fezankhan536]

true

[@ballistic3666]

Exactly

[@akefayamenay104]

*than. Now you’ve got some grammar too 😜

[@jococallos9361]

fck yeah

[@myaopsahl999]

Happy birthday to you and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play a game because I am BORED and I really want to play

[@ExperimentalFun]

I wish we did something cool like this when I was in school... good job on the video! :)

[@AzimuthSolutions]

We didn't even have a science fair at my school.

[@connermcgibbon6934]

I was supposed to do mouse trap cars but my school canceled it.

[@victorcho1242]

Experimental Fun I hate u

[@ExperimentalFun]

why do you hate me?

[@Rikardo35]

Experimental Fun yep same

[@harrystoyadventures817]

I love watching you because you teach me things without making it boring

[@Ha1ivan]

I think he would is a really cool, chill, inspirational, and wholesome teacher in my opinion. 10/10

[@FlorenzVillegas]

Somebody: Creates a contest that's a thing just in the USA. USA: Yay, World Record! ;-)

[@Sillimant_]

It's like the miss universe thing, hardly any competition when it's just earth

[@Jaybuyshoe]

Somebody: Creates a contest that's a thing just in the USA. USA: Yay, World Record! ;-)

[@nathanielkidd2840]

Yeah. The rest of the world just doesn’t show up to compete.

[@gdal6961]

He deserves more. He literally travels soo far for just a video!😸

[@drmg735]

no crap he deserves more

[@camopug]

Yep.

[@ansonpoon4814]

Hmmmm, you heard of Nick Robinson?

[@whitemingo8152]

Yes

[@kiranayuri570]

He also takes like months sometimes

[@Chandrius4263]

Bro's filming in rain.. And I didn't notice the first time.. That is dedication! Keep the lessons going! I love your videos!!

[@Nintendofan295]

Love your videos and I am making a mouse trap car for mine and I decided to watch your video to get an idea of how to do it

[@wink9114]

al is my current physics teacher, ama.

[@angiebeattie4113]

What is your favorite demo so far

[@wink9114]

thanks for the heart mark, now i'm finally famous. angie - probably the one where he blew up the ceiling with a bottle. that one was pretty neat. cos he blew stuff up. with a bottle. will - because i have the mind of a third grader

[@zAznInVaznz]

best teacher ever or what???

[@perluc_]

Did you ever get the „Hammertreatment“?

[@MrDabien]

do you like bread?

[@sev1011]

I remember building mine out of legos. It impressed my Physics Teacher so much that he asked if he could take pictures of it to use for future examples. I hated him as a person, but I respect him as a teacher.

[@playitcoolman7820]

Wow.

[@edmund8954]

Impressive.

[@KmChx_MX]

Well that took an unexpected turn at the end, dang 😂😂

[@adissentingopinion848]

I remember making one in highschool when I had terrible time management. I had to reach a certain distance, and all I had was cardboard and 6 hours the day before it was due. I used a thread spool as a front wheel, comically large lever arm, and the largest circle I could cut out in the back. The thing went 5x the distance of almost everyone else, only being beaten out by the super low friction speedster of my buddy. It's a cherished memory of mine.

[@Mem3Daddy]

i just lovw how mark just continued to explain physics in the rain

[@Hubbmade]

13:30 this is how happy I imagine Mark is *ALL THE TIME* when he's learning, making, and teaching! Keep up the great work!

[@jimmesc]

Hub Han Great minds think alike. I saw that and thought the very same thing as you did. I wish I had as great a mind as Mark.

[@bumpusjones.1978]

The ice cream cone slap was the funniest thing I’ve seen in awhile.

[@malikthemadman]

I remember doing something like this in school but with bottle cars and their were two types that worked really well because we were going off a ramp aiming to get in a bin, one that worked well was light weight and hand wings to glide in so used hardly any power, the other was heavy and basically dropped in like a rock so used more power (my group was the wings one), their was this one group that tried to just copy both designs and combine them together so the heavy thing combined with the wings, so theirs didn't work well because they tried to combine two completely different methods.

[@ZeroQuantum.]

Mark is better at teaching me this than school ever has

[@liamlabelle8653]

I remember building one of these in my 8th-grade science class. Once I finished the project, and presented it at school, my father attached Estes Model Rocket Engines to the car.

[@J0.n.]

Please tell what supplies you got for the car need help for my science project

[@hayleygrimes8804]

Mark: Talking about Mechanical advantages Weather: RAIN! Mark: Keeps talking!

[@lazerblazer528]

Yes

[@fir0fox109]

My high-school science teacher showed this video to the class as an example of conversion of energy. It was epic

[@simplegunsmith]

I made a mousetrap car in 10th grade with a gearbox that made it run for over 30 seconds continuously, but the wheels spun on the tile floor it was tested on and barely went anywhere. Needless to say I didn't win but I've never seen anyone else make one like mine.

[@d1rtworm]

I'm never going to let Mark pour me a glass of tea.

[@goldenmichael9981]

A robot to support robot to give you the part that will attach to a robot that will pour you a tea

[@kosmosan12]

This video is a tutorial for almost all kind of rolling. I mean, it explains drag racing cars tweaks, bicycle gears/wheelsize, etc. Love the video, thx

[@AbasnailPlayz]

We were assigned to watch this in our science class today Amazing decision

[@The1987irocz28]

I did this like 16 years ago. Tip to anyone reading the comments researching build ideas. Give your spring more tension by putting pennies under the opposite side compressing spring a little bit more.

[@Dumbassfish63]

Just get an electric mousetrap and use it as a motor *modern problems require modern solutions*

[@jdwolf55]

I love this comment

[@vye6737]

in the case of science Olympiad at least, you're not allowed to use electronic devices

[@tacosauce6268]

*outstanding move*

[@Doughy3205]

Satria Sutena haha

[@magicl3o]

Solar panel 😂

[@rxq8289]

Nobody: Mark: Dang it I wanted to be a physics teacher but I ended up working at nasa

[@blahnomnomnom]

Lolol definitely

[@finn596]

Aw I wanted to be a millionare not a billionare

[@Tyrantstorm]

@DrewZull Káędîij NASA* but yeah

[@GrandpaPapi]

YourDudeBk because it is really annoying to many people when someone corrects a small issue, ‘cause it makes them feel like they can’t make mistakes or else they get a red flag. i know many people who hate that.

[@zane1623]

@@GrandpaPapi werent you the one that corrected first? and who called someone a nerd?

[@tomtrinchera8405]

Built a pinewood derby car a long time ago and my dad gave me some of the graphite he had -- those wheels had NO resistance, nice advantage!

[@petitloup5059]

your has a bigger wheel, so a bigger scirconference, so just spin faster if the rotation force is aplied to the center of it and the theet are for more friction

[@grimace5800]

My friend built a mousetrap car and it exploded when he tested it in competition

[@verendus7712]

A.D.E 35 oh my hahahahaha

[@wilag8er85]

Wtf did he make it with?

[@sashimi0003]

wilag8er I think he meant like the spring broke and destroyed the car

[@mr.peanutharry7723]

Your picture makes this comment better

[@ratrat5072]

A.D.E 35 wow

[@danknoodle657]

1:44 Mark:blah blah blah Rain:my time has come

[@ChachoGSX]

I made one with 2 mouse traps in series with the string attached to a 2 sided fishing hook so it could be tranferred to the second bar. It was a cool idea and worked but not as well as the long armed ones.

[@MS6870]

I love how committed he is, he filmed even when it was raining!

[@ralph7349]

i just love how she punches the icecream out of marks hand

[@questionmark3073]

questacon 😇

[@cardmusician5355]

More of a slap but......

[@jasonbaker541]

I love what you do and patiently wait for each video.Thank you for making me and my family smarter and more interested in science.

[@ab-zd3ue]

.

[@rebelflag_4206]

Ive done this in 5th grade and it was very fun trying to build one and getting it to go far

[@dontavious3772]

Thank you for the video Mark Rober, I'm doing mouse trap racers for an engineering unit!

[@silverturtle0213]

All I said was "new Mark Rober video" and the 5 yr old and 9 yr old came a-runnin' :) We love science in this house.

[@reicintron]

UgniusKas ja 💀

[@silverturtle0213]

UgniusKas yes, I was a physics major for 2 years so i can clarify but I'm not great at getting them excited. They somewhat get it but Mark is very entertaining too.

[@davantebaptiste5038]

Nice wip

[@davantebaptiste5038]

Mr. mouse is getting all the honeys in his car

[@davantebaptiste5038]

Do your thing Mr. mouse

[@mattfromwiisports2293]

Can we get a R.I.P in the chat for Mark's ice cream

[@lnx-retr0438]

RIP

[@playstation6977]

RIP

[@Ripsawman0]

Rest in peace

[@calebyao.]

RIP

[@hossclark2889]

Rip

[@calebisaverage1069]

Bro thank you so much, I needed this for my school physics project

[@jlouzy3829]

We use to race RC cars before they came out with li-ion batteries. I generally raced stock that meant 6 cells, no ball bearing motor with less turns. I think we ran either 3 minute heats or 5 and it was a great feeling when you could get your car across the finish line and then the battery run dead on another lap or two. The goal was to use all the stored energy even if it was a crappy battery pack.

[@Kevin-rc5ec]

The street fighter transition at 4:27 is amazing. Thank you for putting in that extra effort into your videos!

[@lettuce7378]

"I could move the earth if I had a lever strong and long enough" -Archimedes (supposedly)

[@aidanbeattie8341]

That lever would have to be 3 light-years long but yeah

[@lettuce7378]

@@aidanbeattie8341 lol yea

[@ashishere771]

@@aidanbeattie8341 well better get building

[@mrugankthatte4378]

And a place to stand*

[@lettuce7378]

@@mrugankthatte4378 yes

[@intheovaloffice]

Explained mechanical advantage in five minutes with twenty or so examples better than my physics teacher did for a whole school year . . .

[@romanski5811]

Seems like you have some animosity toward your teacher. Stop intentionally disrupting his class and not listening.

[@chelseynegron]

Such a fun idea for a snow day craft with my science-obsessed kiddo :D

[@parklloyd6690]

Holy cow! Thank you for another amazing video. I have two sons studying engineering at Utah State and we all love your videos. We're going to have to have a family mousetrap car competition. and then AFTER that, I'll show them the video. Keep up the great work.

[@tetardfoo8863]

"I can lift 10 pounds 50 times" *has a 12 pound weight*

[@giornogiovanna4758]

same thing different number

[@cartervaught3629]

Lol

[@DocFanti]

Huh

[@wrog7616]

I saw that too! lol

[@bronysavior7740]

Looks like it says 14 not 12

[@TheKnockOffTRex]

0:31 Mark: Wait wait wait, don't leave. Me: I wasn't going to-

[@jessmarsuen2784]

I have no idea what he’s talking about but I just listen

[@sunnyhacksdiy3509]

Same

[@DrFistyCuffs]

I made one in middle school using just the mousetrap for the body and I glued the string to the rear axle. It was exactly long enough to go the minimum distance required for the project before it caught itself and caused the car to do a sweet drift and stop right on the line

[@kevinshi7168]

scioly?

[@dais6155]

Can we just take a moment to appreciate the fact that Mark stood outside while it was sprinkling/raining all for a video for us...👏🏼👏🏼👏🏼❤️

[@KingEggAlot]

Thank you mark for making learning fun

[@barry.winchester5998]

I’m starting my build in school tomorrow thank you so much for this