Which Way Is Down?

Which Way Is Down?

BRAIN CANDY LIVE http://www.braincandylive.com/tickets
THE VSAUCE CURIOSITY BOX: https://www.curiositybox.com/
Links to sources and to learn more below!

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

Thanks to Eric Langlay (https://www.youtube.com/user/ericdraven30) for producing, editing, and animating this episode with me. Thanks also to Henry Reich (https://www.youtube.com/user/minutephysics) for his advice and guidance.

Universe Sandbox² : http://universesandbox.com/

Mass vs weight:

Great Veritasium video: https://www.youtube.com/watch?v=_Z0X0yE8Ioc
two other great videos: https://www.youtube.com/watch?v=6ccIjRwYO9U and https://www.youtube.com/watch?v=aCqQzrPCcFM

baseballs coming together under gravitational attraction can be simulated in Universe Sandbox 2. More math behind it can be found here: https://www.reddit.com/r/explainlikeimfive/comments/2vyxl7/eli5_will_two_baseballs_a_foot_apart_in_deep/

Weight to mass (on surface of Earth) convertor: https://www.convertunits.com/from/kilograms/to/newton

pencil and Earth falling numbers: https://www.quora.com/When-we-drop-a-pencil-the-earth-attracts-it-and-it-seems-that-the-pencil-is-falling-towards-earth-Why-doesnt-the-earth-come-up-towards-the-pencil

NASA HD footage: https://archive.org/details/NASA-Ultra-High-Definition

Buoyancy: https://en.wikipedia.org/wiki/Buoyancy

Earth’s spin and its effect on ‘down’: http://www.freemars.org/jeff/Earth/down.htm

The measurement of Earth and its gravity:


Movement of Earth’s center of mass:


you get heavier before you get lighter as you descend into Earth: https://www.reddit.com/r/askscience/comments/4qfl52/do_you_get_lighter_the_further_underground_that/

vertical deflection:


practical uses of measuring gravity: https://en.wikipedia.org/wiki/Gravimetry



Interactive Earth geoid: https://experiments.withgoogle.com/chrome/geoid-viewer

your weight when moon is overhead: https://www.thenakedscientists.com/forum/index.php?topic=11639.0

Hammer and feather drop on moon: https://nssdc.gsfc.nasa.gov/planetary/lunar/apollo_15_feather_drop.html

Why things fall at the same rate: https://www.quora.com/If-an-object-has-more-mass-then-its-pull-on-earth-would-be-greater-than-an-object-with-less-mass-and-therefore-should-fall-to-earth-faster-Why-do-objects-of-different-mass-fall-to-earth-at-the-same-speed

Wolfram Alpha cone geodesic tool: http://demonstrations.wolfram.com/ConeGeodesics/

General Relativity:

simple animation showing geodesic on cone and how it causes motion DOWN in space: https://www.youtube.com/watch?v=DdC0QN6f3G4
GREAT pbs spacetime video (watch the whole channel): https://www.youtube.com/watch?v=AwhKZ3fd9JA


time and gravity:

tests of general relativity: https://en.wikipedia.org/wiki/Tests_of_general_relativity


great introductory texts:

“Relativity Visualized” by Lewis Carroll Epstein https://www.amazon.com/Relativity-Explained-Classics-Science-Mathematics/dp/0486293157

There’s also this PDF that takes Epstein’s diagrams into more detail: http://www.relativity.li/uploads/pdf/English/Epstein_en.pdf

“Relativity Simply Explained” by Martin Gardener https://www.amazon.com/Relativity-Explained-Classics-Science-Mathematics/dp/0486293157

great intro to the math of general relativity:

“A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity” by Peter Collier https://www.amazon.com/Most-Incomprehensible-Thing-Introduction-Mathematics/dp/0957389469/

Requires some background in relevant math topics (see above) but very very good:

“Spacetime And Geometry: An Introduction To General Relativity” by Sean Carrol https://www.amazon.com/gp/product/9332571651/

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20 Responses

  1. Bandi Namci says:

    Only watched this video for *M E M E S*

  2. Anzor Aslanukov says:

    Video is a lie because the Earth is obviously flat

  3. Matschgo says:

    So gravity is the buoyancy of time?

  4. Xhar Jhon Suarez says:

    Then why is moon drifting ayaw from earth?

  5. BinTan Blanc says:

    13:52 someone has been watching too many memes

  6. Aaron Warner says:

    I’m so high, I love Vsauce

  7. matt fritz says:

    R u saying the earth is fl@?

  8. lolhahalol2 says:

    I shortly lost it at air ror

  9. TheDerpWaffle says:

    you hurt my brain
    i hearz too much

  10. Saladriel Amrael says:

    One of the best science video I’ve ever seen. Thanx

  11. Daniel Lewis says:

    1- Look up
    2- Look the other direction

  12. hoboX10 says:

    How do you not have any shows in Texas? The fuck?

  13. Justin Drake says:

    i have still never watched a vsauce video that hasnt made me watch it again just to understand all of it

  14. kegga4 says:

    11:17 look at all those tabs..
    12:41 oh.

  15. Cardi B says:

    How these trash videos trend? In confused yall help mine trend pls like share and subscribe https://youtu.be/SHhxa0TXMLU

  16. Sebastian Emir Llapur Gandulfo says:

    Ok, Michael, sick of your shit. Where THE FUCK did you get that baseball from?

  17. cleoot091 says:

    3:42 this bugs me, you even disprove this later on

  18. Cereal KILLER says:

    My 6 year old son watching Vsauce, He should get Oscar award

  19. Steven Hamilton says:

    What’s that music @9:59? That was aggravating!

  20. zibbydafuq jo says:

    Those guitar riffs just before the end vibed me up. Anyone know the name of the music?

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