A Physics Prof Bet Me $10,000 I'm Wrong

16,122,062
0
Published 2021-06-30
A UCLA Physics Professor bet me $10,000 that my video about going downwind faster than the wind was wrong. This video is sponsored by Brilliant. The first 200 people to sign up via brilliant.org/veritasium get 20% off a yearly subscription.

For more information about the Veritasium Science Communication Contest check out -- ve42.co/contest

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
The wager agreement: ve42.co/wager

Prof. Kusenko's slides: ve42.co/Kusenko

My rebuttal: ve42.co/rebuttal
▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
Huge thanks to Xyla Foxlin for building the model cart, and making the instructions so accessible to the public. Check out Xyla's video --    • Building the Vehicle Physicists Calle...  

A massive thanks to Bill Nye, Neil DeGrasse Tyson, and Sean Carroll for witnessing the signing of the wager.

A huge thanks to Prof. Alexander Kusenko for being a man of honour -- it's a difficult thing to change your mind, especially in a public forum.

A huge thanks to Prof. Mark Drela for the interview and help making sure we got the physics right.

A massive thanks to Rick Cavallaro for making Blackbird, all your insights, analysis, data, and general help with these videos -- it was so fun to work with you on this crazy project -- check out Rick's channel ve42.co/Rick

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
References
M. Drela. Dead-Downwind Faster Than The Wind (DDWFTTW)
Analysis (Jan 2009) -- ve42.co/Drela

2013 AAPT United States Physics Olympiad Semifinal Exam -- ve42.co/AAPT2013

Rick's treadmill footage -- ve42.co/Treadmill

Rick's multiple explanations of how Blackbird works -- ve42.co/DDWFTTW

Blackford, B. L. (1978). The physics of a push‐me pull‐you boat. American Journal of Physics, 46(10), 1004-1006. — ve42.co/Blackford1979

Ruina corrects errors in the above paper: ruina.tam.cornell.edu/research/topics/miscellaneou…

Forum discussions -- ve42.co/forum Blog -- ve42.co/blog1 and retraction ve42.co/BlogRetraction

Bauer, A. B. (1969, April). Faster than the Wind. In First AIAA Symposium on Sailing. -- ve42.co/Bauer1969

Bauer's Obituary -- ve42.co/BauerObituary

Gaunaa, M., Øye, S., & Mikkelsen, R. F. (2009). Theory and design of flow driven vehicles using rotors for energy conversion. In EWEC 2009 Proceedings online EWEC

Md. Sadak Ali Khan, Syed Ali Sufiyan, Jibu Thomas George, Md. Nizamuddin Ahmed. Analysis of Down-Wind Propeller Vehicle. International Journal of Scientific and Research Publications, 3, 4. (April 2013) ISSN 2250-3153.

The Manim Community Developers. (2021). Manim – Mathematical Animation Framework (Version v0.13.1) [Computer software]. www.manim.community/

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
Special thanks to Patreon supporters: Mike Tung, Evgeny Skvortsov, Meekay, Ismail Öncü Usta, Bill Linder, Paul Peijzel, Crated Comments, Anna, Mac Malkawi, Michael Schneider, Oleksii Leonov, Jim Osmun, Tyson McDowell, Ludovic Robillard, Jim Buckmaster, fanime96, Juan Benet, Ruslan Khroma, Robert Blum, Richard Sundvall, Lee Redden, Vincent, Marinus Kuivenhoven, Alfred Wallace, Arjun Chakroborty, Joar Wandborg, Clayton Greenwell, Pindex, Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi, Ron Neal

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀

Written and Edited by Derek Muller
Animation by Mike Radjabov
Manim equations by Jonny Hyman
Filmed by Emily Zhang and Raquel Nuno
Music from Epidemic Sound epidemicsound.com/ and by Jonny Hyman
Additional video supplied by Getty Images
Produced by Emily Zhang, Petr Lebedev and Derek Muller

All Comments (21)
  • Derek, can you just turn Veritasium into a gambling channel where scientists with opposing views put money on the table and face off to try to convince one another of the true answer? I'd watch that.
  • @BaalFridge
    "You have a much lower error rate than most youtubers" is probably the highest mark of approval you can get from a uni professor !!!
  • @0222tomi
    Kusenko, you legend. Anyone who speaks his mind in a situation like this, gets corrected, and controls his ego like advanced human, putting fun and progress first is the MVP.
  • @lukasvit4916
    Kusenko has my respect, losing bet in your own science and keeping it civil and admitting he is wrong is truly respectful. he has the balls
  • @Nightstick24
    Wow, I forgot that rational and intelligent people who can have a disagreement, openly listen to arguments against their point of view, and then admit they were wrong and change their minds still exist. It's such a rare thing nowadays.
  • @martijnm71
    the world needs more scientists, disagreeing about something and the only thing that happens is a very civil discussion.
  • @VicJang
    Professor Kusenko gets my respect. Being able to accept being wrong and pay out the bet shows a lot about his personality. His students are lucky to have him as a mentor.
  • i love that the professor only was challenging this point because he thaught "you made a mistake here which you dont often do and i dont want you to accidently spread misinformation since you usually are a very trustworthy source"
  • @TheCuriousNoob
    The professor is a true man of science. He was wrong, admitted failure, and learned something new! If only all scientists were so pure.
  • @daddydiy9008
    I learned that if a UCLA professor says I’m wrong, then I should hire a MIT professor to prove him wrong
  • @dibdab7990
    Derek's misleading when he says Professor Kusenko “changed his mind in light of the evidence.” Professor Kusenko never changed his mind and still believes the Blackbird doesn’t work. He only conceded the bet on a technicality, still insisting it was just the wind pushing it along. From Rick Cavallero: "He conceded on a technicality - that the vehicle moves marginally faster than the wind temporarily." "I offered him another $10,000 bet because his technicality is entirely wrong, but I know I won't be hearing from him." So Professor Kusenko is not a rockstar or some scientific legend. Personally, I think he was just an egotistical professor who thought he could publicly school Rick Cavellero and some dumb YouTuber, only to end up getting schooled himself. And his ego was too bruised for him to ever even consider admitting he was be wrong. Hardly very scientific of him now...
  • @khushshiwani7581
    Awesome understanding and explanation. The best part of this explanation is that it is mathematically and physically robust because of those equations of power. This is why Veritasium is my favorite YouTube channel, a consistency of good quality content that can be seen in every video. And with this, this video has become my favorite video on my favorite YouTube channel. Well done!⛵⛵
  • @marvp7202
    He disagreed, he still disagreed and then he realised that he was wrong and conceded his position. If only matters of politics and other public debate would be handled in such professional manner…
  • @aryanverma6660
    Are we not gonna talk about how he can just summon Neil degrasse Tyson and Bill Nye at his will
  • @72151
    Being wrong is the best thing to happen, providing the opportunity to learn what one didn’t know before. Being respectful and humble about being wrong is championship caliber!
  • Wonderful point at the end! Last year I wrote software for NASA that did my job for them. I then retired happy. In my last two weeks, coworkers realized that they didn’t know enough about the physics behind my software. I was thrilled and commented, “I’m happy to be challenged!” I wanted them to USE my software confidently. I laid out the ENTIRE set of equations leading from start to finish. Everyone including me was satisfied. If there was a mistake (there wasn’t) I WANTED to know. Peer review is highly important.
  • @nightshark1156
    "So I called Neil DeGrasse Tyson and Bill Nye" hot DAMN that's a flex and a half
  • @sh3n3ng
    Being wrong is painful, accepting that you’re wrong takes courage. Bet or no bet, I admire the professor and veritasium
  • @brofenix
    Wow interesting~ Good for the professor having a level-headed conversation about this topic.
  • This reminds me of science history where scientists would publicly debate their ideas. Both parties made convincing arguments and from the start i knew the two of you guys were educated and strong-willed; regardless of who was wrong, both of you guys look like better men for it. Would love to see videos with a similar styled format! The appeal for me however is seeing two smart people discuss small possible problems, not crazy stuff. Had to rewatch a few times to follow the math a bit better, and thats what Im here for. Stuff like this makes me want to learn and dive headfirst into equations I normally wouldnt pay a second thought to