Why Does The Earth Spin?


The Earth spins on its axis, completing a full revolution every day. By why does it do this? One of the most common misconceptions in physics is the belief that constant motion requires a constant force. So many people believe there must be some force in the Earth (e.g. gravity, centrifugal force) that keeps it spinning. In truth, no force is required because a fundamental property of mass is that it maintains its state of motion in the absence of external forces. This property is called inertia.

Proof that "The Centrifugal Force" is not real! | Doc Physics


Centripetal force is needed to keep things moving in a circle. And why dont they want to? THEY JUST WANT TO GO IN A STRAIGHT LINE. REALLY. THATS ALL EVERYTHING WANTS TO DO.

P.S. If you have a masters degree or PhD in physics and would like to talk to me about rotating reference frames, Id love to. But this is not the right context. This videos purpose is to demonstrate inertia in inertial reference frames. You know, the ones where Newtons Laws apply. Yeah, those. Certainly youll agree that inertia is of the greatest conceptual importance. As a teacher, I have found that most people I meet do not have a conceptual understanding of inertia though they are able to recite Newtons First Law in a droning voice when asked. Words with no meaning. Blech.

BTW — Those who like accelerated reference frames and their challenges may enjoy this video about impending motion of rigid solids:
www.youtube.com/watch?v=JLHVf3eJKak
I made it. Maybe you like watching physics videos in your spare time.

And I will SORTA agree with you if you claim that theres a centrifugal force on the wood ring (as a 3rd-law counterpart to the centripetal force on the ball). I like Newtons 3rd as much as the next guy, but youre creating a REALLY shady definition. If we had no friction, the ring wouldnt even be moving. How you gonna define «center fleeing» for something that is not only not going in a circle...its not moving at all??!@?#$%?^$#?%$# But thats just a technical complaint. Really, I am just trying to convince early physics students that the BALL feels no outward force. Cuz trust me, THEY THINK IT DOES. Ask your mom — she may even think the ball feels an outward force. My people often predict that the balls path will curve OUTWARD from the circle. Thats what Im really trying to cure here. Love you, though! Keep warm this winter!

Where Do Deleted Files Go?


Follow Michael Stevens for neat things every day! www.Twitter.com/tweetsauce
LINKS AND SOURCES BELOW

MUSIC BY: www.YouTube.com/JakeChudnow

final song is «Midnight Sound» by Gareth Johnson / David OBrien
from: www.audionetwork.com

Lost silent films: www.silentera.com/lost/index.html

Wonders of the Ancient World: en.wikipedia.org/wiki/Seven_Wonders_of_the_Ancient_World

What have we lost forever?

ask.metafilter.com/80517/What-have-we-lost-forever
en.wikipedia.org/wiki/Lost_history

snapchat: www.snapchat.com/

Lenin and Trotsky doctored photos: www.tc.umn.edu/~hick0088/classes/csci_2101/false.html

Archived person-removal-service site: web.archive.org/web/20060212134125/http://www.digital-restoration.com/unwanted.asp

Google Ngram tool: books.google.com/ngrams

links to info about digital file deletion:

www.reddit.com/r/YouShouldKnow/comments/1e4p7g/ysk_how_deletion_works_on_a_computer_and_why/
en.wikipedia.org/wiki/Data_erasure
en.wikipedia.org/wiki/Bad_sector
en.wikipedia.org/wiki/Secure_erasure

Melanie Willhide glitched photos (NSFW): www.slate.com/blogs/behold/2013/01/09/melanie_willhide_to_adrian_rodriguez_with_love_photos.html

Electronic waste dumps in Africa: en.wikipedia.org/wiki/Agbogbloshie

Paper-shredding: www.slate.com/articles/news_and_politics/explainer/2009/07/unshreddable.html

UNSHREDDER: www.unshredder.com/www/407/1001127/default.asp

Iranian reassembly of documents: www.bbc.co.uk/news/magazine-16036967

HEAT DEATH: en.wikipedia.org/wiki/Heat_death_of_the_universe

HEAT DEATH button on etsy: www.etsy.com/listing/58392676/ask-me-about-the-heat-death-of-the

entropy: en.wikipedia.org/wiki/Entropy

«The Last Question» by Issac Assimov: www.thrivenotes.com/the-last-question/

bleached flags on moon: www.hq.nasa.gov/alsj/ApolloFlags-Condition.html

Supertasks


The Vsauce Holiday Box is here! Its full of exclusive Vsauce merch, cool science toys, and ALL Vsauce proceeds are donated to Alzheimer’s research!!! ORDER HERE: geekfuel.com/Vsauce

SOURCES AND EXTRAS:

my twitter: www.twitter.com/tweetsauce
my instagram: www.instagram.com/electricpants

Gabriel’s horn:

en.wikipedia.org/wiki/Gabriel's_Horn
blog.plover.com/math/gabriels-horn.html

Gabriel’s wedding cake:

oumathclub.wordpress.com/2015/01/25/gabriels-wedding-cake/
PDF: people.emich.edu/aross15/math121/misc/gabriels-horn-ma044.pdf

Supersolid PDF: people.emich.edu/aross15/math121/misc/love-1989-supersolids.pdf

Zeno’s supertask paradoxes:

en.wikipedia.org/wiki/Zeno's_paradoxes
math.dartmouth.edu/~matc/Readers/HowManyAngels/SpaceTimeMotion/STM.html
www.youtube.com/watch?v=u7Z9UnWOJNY

Staccato Zeno runner with no velocity/acceleration discontinuities: goo.gl/2mYdcT

General supertask reads:

personal.lse.ac.uk/robert49/ebooks/PhilSciAdventures/lecture25.html
plato.stanford.edu/entries/spacetime-supertasks/
mathpages.com/rr/s3-07/3-07.htm
math.dartmouth.edu/~matc/Readers/HowManyAngels/SpaceTimeMotion/STM.html
en.wikipedia.org/wiki/Supertask
www.vordenker.de/gunther_web/achill1.htm

Big book of collected supertask writing: books.google.co.uk/books?id=0AzP9WLLJLcC

SPACE STRAW


Опубликовано 6 апреля 2013 года

Кликни, чтобы бесплатно подписаться! bit.ly/POIaN7
Линки на использованную информацию внизу.
www.twitter.com/tweetsauce
www.facebook.com/VsauceGaming

Музыка Джейка Чудноу:
soundcloud.com/jakechudnow
www.YouTube.com/JakeChudnow

Чудесное видео от Veritasium о самой большой соломке в мире: www.youtube.com/watch?v=HUmZrtiXDik

видео Vsauce ни о чем: www.youtube.com/watch?v=K93zcgFsynk

видео Vsauce об истощении запасов гелия (и о других вещах): www.youtube.com/watch?v=DU3OdTLuHf0

видео Vsauce о наготе в космосе: www.youtube.com/watch?v=lD08CuUi_Ek

набор и потеря веса Землей: gizmodo.com/5882517/did-you-know-that-earth-is-getting-lighter-every-day

набор веса Землей от солнечного света: image.gsfc.nasa.gov/poetry/ask/a11325.html

границы атмосферного давления: en.wikipedia.org/wiki/Suction

Плавучесть: en.wikipedia.org/wiki/Buoyancy

Плавучесть, обусловленная воздухом: www.madsci.org/posts/archives/2010-03/1267798222.Ph.r.html

прекрасная диаграмма земной атмосферы: library.thinkquest.org/C003124/en/atmos.htm

изображение метеорита, падающего на Землю: www.nasa.gov/mission_pages/station/multimedia/gallery/iss028e024847.html

статья о том, как космическая материя сходит в земную атмосферу: static.icr.org/i/pdf/technical/Moon-Dust-and-the-Age-of-the-Solar-System.pdf

Ссылки о дыхании и молекулах:
www.vendian.org/envelope/dir2/breath.html

rsloan.newsvine.com/_news/2009/05/03/2768580-the-odds-that-youll-breathe-a-single-molecule-of-air-that-once-traveled-through-the-lungs-of-jesus

www.thehappyself.com/happiness-challenge-1-100-breaths

обмен веществ в тканях мозга: www.acnp.org/g4/gn401000064/ch064.html

Элементы, входящие в состав вдыхаемого и выдыхаемого воздуха: en.wikipedia.org/wiki/Breathing#Breathing_in_gas

The Brachistochrone


BRAIN CANDY LIVE TICKETS: www.braincandylive.com/tickets
Links to sources and to learn more below!
MY TWITTER: www.twitter.com/tweetsauce
MY INSTAGRAM: www.instagram.com/electricpants
THE CURIOSITY BOX: www.curiositybox.com/

Stan Wagon “Roads and Wheels” [PDF]: web.mst.edu/~lmhall/Personal/RoadsWheels/RoadsWheels.pdf

3Blue1Brown video, “The Brachistochrone, with Steven Strogatz”: www.youtube.com/watch?v=Cld0p3a43fU

Pile of people visualization originally from this Vsauce1 video: www.youtube.com/watch?v=C6eOcd06kdk

Online spirograph: nathanfriend.io/inspirograph/

The Brachistochrone whistleralley.com/brachistochrone/brachistochrone.htm

Rolling:
www.animations.physics.unsw.edu.au//jw/rolling.htm
teacher.pas.rochester.edu/phy121/LectureNotes/Chapter12/Chapter12.html

Refraction of light:
www.physicsclassroom.com/class/refrn/Lesson-1/Refraction-and-Sight
www.funscience.in/study-zone/Physics/RefractionOfLight/AtmosphericRefraction.php
www.walter-fendt.de/html5/phen/refractionhuygens_en.htm
micro.magnet.fsu.edu/primer/java/particleorwave/refraction/
astro.unl.edu/classaction/animations/telescopes/snellslaw.html
demonstrations.wolfram.com/FermatsPrincipleAndSnellsLaw/

Feynman on The Principle of Least Time: www.feynmanlectures.caltech.edu/I_26.html

cycloid as answer to brachistochrone: sinews.siam.org/About-the-Author/quick-find-a-solution-to-the-brachistochrone-problem-1

Music from:
www.youtube.com/jakechudnow
and
www.audionetwork.com

Roulette animations by Eric Langlay www.youtube.com/c/ericlanglay

good relevant Wikipedia articles:

en.wikipedia.org/wiki/Brachistochrone_curve
en.wikipedia.org/wiki/Tautochrone_curve
goo.gl/SlRDhK
en.wikipedia.org/wiki/Cycloid
en.wikipedia.org/wiki/Snells_law

Wolfram demonstration projects used:

«Cycloid Curves» from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/CycloidCurves/
Contributed by: Sean Madsen
Additional contributions by: David von Seggern (U. Nevada, Reno)

«Shaping a Road and Finding the Corresponding Wheel» from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/ShapingARoadAndFindingTheCorrespondingWheel/
Contributed by: Stan Wagon (Macalester College)

Math Magic


Links to sources, more math magic, and other cool things below!
My Twitter: www.twitter.com/tweetsauce
My Instagram: www.instagram.com/electricpants

Thanks to Vanessa from BrainCraft! Check out her channel: www.youtube.com/user/braincraftvideo

Matt Parkers standupmaths channel: www.youtube.com/user/standupmaths

Matts video I mention: www.youtube.com/watch?v=aNpGxZ_1KXU

STEMMathsMagic channel: www.youtube.com/user/STEMMathsMagic

The STEMMathsMagic video I reference: www.youtube.com/watch?v=r-LO8zQ9eTs

STEMMathsMagic website (check out the manual!): www.mathematicalmagic.com/thetricks.html

mismag is amazing. He introduced me to MANY self-working mathematical tricks. Please check him out! www.youtube.com/user/mismag822

MUSIC in this episode is from:

Jake Chudnow: www.youtube.com/user/jakechudnow
zach mccoy: zachmccoy.bandcamp.com/
audionetwork: www.audionetwork.com

Shakespeare and Psalm 46:

en.wikipedia.org/wiki/Psalm_46
www.umsl.edu/~thomaskp/sbible.htm
www.apologeticspress.org/apcontent.aspx?category=13

What Will We Miss?


Follow Michael Stevens for MORE: www.twitter.com/tweetsauce
LINKS AND SOURCES BELOW

When was I conceived? www.whenwasiconceived.com
Another conception calculator if the above link is down: www.paulsadowski.com/Birthday.asp
(you can also Google «conception calculator» and find a bunch)

Birthday star calculator: outreach.jach.hawaii.edu/birthstars/year.php

6009: en.wikipedia.org/wiki/7th_millennium

Zeitpyramide / Time Pyramid: en.wikipedia.org/wiki/Time_pyramid

Time Pyramid today VIDEO: www.youtube.com/watch?v=8ggB7HQyRZ8

Chernobyl: en.wikipedia.org/wiki/Chernobyl_Exclusion_Zone

Awesome Kraftwerk preformance of «Radioactivity»: www.youtube.com/watch?v=0EBTn_3DBYo

Supernova viewed from Earth simulation VIDEO: www.youtube.com/watch?v=dtWeH4-Ugy4

Betelgeuse: en.wikipedia.org/wiki/Betelgeuse

Eta Carinae: en.wikipedia.org/wiki/Eta_Carinae

Andromeda and Milky Way collision:

www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html
hubblesite.org/newscenter/archive/releases/2012/20/image/c/
en.wikipedia.org/wiki/Andromeda–Milky_Way_collision

FOMO (Fear Of Missing Out):

www.nytimes.com/2011/04/10/business/10ping.html?src=recg

What If Everyone JUMPED At Once?


Опубликовано 18 августа 2013 Твиттер Майкла Стивенса www.twitter.com/tweetsauce

Передавайте привет Гику и Сандри от Vsauce: www.youtube.com/watch?v=6-Wef0694aY

Фейсбук: www.Facebook.com/VsauceGaming
Музыка Джейка Чудно: www.SoundCloud.com/JakeChudnow

Благодарю
www.youtube.com/phoenixsaintly
и
www.youtube.com/theINENIvlogs
за помощь в подготовке видео «Лето в городе»!!!
theINENIvlogsза кадром сьемок Лето в городе" вместе со мной: www.youtube.com/watch?v=F_Rd35906MQ

Почему индикатор просмотров на Ютубе застряет на отметке 301 (подпишитесь на канал FTW, серьезно): www.youtube.com/watch?v=oIkhgagvrjI

Землетрясение в Японии и вращение Земли: en.wikipedia.org/wiki/2011_Tōhoku_earthquake_and_tsunami#Geophysical_effects

Если бы все люди жили в одном городе: persquaremile.com/2011/01/18/if-the-worlds-population-lived-in-one-city/

плечом к плечу: news.nationalgeographic.com/news/2011/10/111031-population-7-billion-earth-world-un-seven/

Видео БиБиСи о прыжке: www.bbc.co.uk/learningzone/clips/if-the-whole-world-jumped-at-the-same-time-would-the-planet-move/13428.html

СООТНОШЕНИЯ РАЗМЕРОВ ВО ВСЕЛЕННОЙ. УЛЕТ!: htwins.net/scale2/

ОФИГЕННАЯ статья о прыжках: www.straightdope.com/columns/read/142/if-all-chinese-jumped-at-once-would-cataclysm-result

Dot Physics о прыжках: www.wired.com/wiredscience/2010/08/what-if-everyone-jumped/

интерактивная шкала Вселенной: scaleofuniverse.com/

Об отборе одной десятой части: www.etymonline.com/index.php?allowed_in_frame=0