SCIENCE CLASS #5- How Do Astronauts Weigh Themselves?

Today we'll be discussing inertia and Newton's 1st law!

Hit me up with your creative interpretations to this class on Insta, Twitter, FB, or TikTok to win some Bose 700s. Alternatively you could tell your friends about our class here together. 8 winners. Maybe do one of the demos or a new one or make a video teaching your friends a principle from the class!

I stream classes every Wednesday at 1pm!

Check out Dianna's channel where she did 20 experiments around her house in 5 minutes!
Check out Bob's channel-


  1. Mark Rober

    Mark RoberPred letom

    Hit me up with your creative interpretations to this class on Insta, Twitter, FB, or TikTok to win some Bose 700s. Alternatively you could tell your friends about our class here together. 8 winners. Maybe do one of the demos or a new one or make a video teaching your friends a principle from the class!

  2. Alexandra

    AlexandraPred 23 dnevi


  3. Spacelover 900

    Spacelover 900Pred 29 dnevi

    @Kevin Luo pretty sure he knows that

  4. Nightmare

    NightmarePred mesecem


  5. Nick E

    Nick EPred 4 meseci

    Is it possible to send a message in space

  6. batxvv bolor

    batxvv bolorPred 6 meseci

    @Kevin Luo Uub

  7. Luis Miguel

    Luis MiguelPred 7 dnevi

    Mass is not a meassure of how much stuff is in an object.

  8. Nick Hanson

    Nick HansonPred 22 dnevi

    What law is the ketchup if u hold it upside down and swing your arm in a circular motion doing the bottom half of a sphere and the ketchup moves toward the top?

  9. Mahiyat Safiyullah

    Mahiyat SafiyullahPred 26 dnevi

    Simple mass in kg is the same wherever you go so mass times gravitational field strength equals weight. P.S. the gfs of the Moon is 1.6 N Kg-¹.

  10. Aanya Makhija

    Aanya MakhijaPred mesecem

    Why don't my school teachers teach like this huh?

  11. TheRedDemon

    TheRedDemonPred mesecem

    im watching this while doing homework. im 4 mins in and iv learned more so far then in all the homework iv been doing for a little over an hour.

  12. 152 Srikar Yendluri

    152 Srikar YendluriPred mesecem

    "That brick wall ain't going any where" - Mark rober 2020

  13. Lynn Watkins

    Lynn WatkinsPred 2 meseci

    16:04 i was the one on the right

  14. Angel Jonguitud

    Angel JonguitudPred 2 meseci


  15. Cast and Spear

    Cast and SpearPred 2 meseci

    The millennial bill nye

  16. Federal Noob association

    Federal Noob associationPred 2 meseci

    1 nail would hurt all those nails equal it out so won't cut you like 1 nail would

  17. Lorie Woughter

    Lorie WoughterPred 2 meseci

    How do I send it

  18. Ra

    RaPred 3 meseci

    Skip to...12:00 to know how 😅

  19. ItchYoBoi BefTheGreat

    ItchYoBoi BefTheGreatPred 3 meseci

    I wish u were my Psychics Teacher XD

  20. Shadow Phoenix YT

    Shadow Phoenix YTPred 3 meseci

    "Which is easier to move? The wagon or the Semi-Truck?" Strong guy: Can't move a wagon without making it go flying: "The truck."

  21. Gary Cullen

    Gary CullenPred 3 meseci

    The fresh pail ethnically murder because trout increasingly pack except a wandering romania. cluttered, chubby shirt

  22. Ishuman Chaudhary

    Ishuman ChaudharyPred 3 meseci

    Tomorrow's someone's birthday. Dropping a video would be a treat for us, even for the celebration.. Love you Mark. Happy birthday in advance.

  23. IBPASNU Gaming

    IBPASNU GamingPred 3 meseci

    I personally prefer not to have a hammer or a weight thrown at me.

  24. Tater’s Woodshop

    Tater’s WoodshopPred 3 meseci

    “Class is over!” I don’t want to leave yet!😢 Absolutely awesome classes!

  25. Emma Yennie

    Emma YenniePred 3 meseci

    Nobody: Mark: "If this hurts, your fired!"

  26. la science avec ayman

    la science avec aymanPred 3 meseci


  27. Sandro Francis Miranda

    Sandro Francis MirandaPred 3 meseci

    "Objects are lazy" - ROBER, Mark 2020

  28. Eric R

    Eric RPred 4 meseci

    I had your "calculate the weight of an astronaut" question on a final physics exam in college (Carnegie Mellon). I gave your response by using springs and the formula. However, I only got 1/2 credit because I failed to talk about the effects of the spring on the spacecraft -- i.e. the spacecraft will exert a force on the spring as the spring interacts with the spacecraft. So, the answer is more complex than just a simple formula!

  29. God of thunder

    God of thunderPred 4 meseci

    Thos are for kids. 13:15

  30. Aziz Fenais

    Aziz FenaisPred 4 meseci

    Mark, from a fellow Engineer to another, you are a great representative and admire your work. I learned from many things so let me try to payback and teach you something... Dubai is a city in UAE not a country 😋

  31. Nick E

    Nick EPred 4 meseci

    My experiment is going to be which bachery works better a lemon or potato by putting them in surcets and seeing which light will be brighter

  32. Moneyiscoollol

    MoneyiscoollolPred 4 meseci

    13:35 Voice crack

  33. jon vw

    jon vwPred 4 meseci

    Simply, Thank you!

  34. Samuel Rogers

    Samuel RogersPred 4 meseci

    Why not weigh them when doing routine thrusts, for maintaining orbit distance. Just use a very accurate scale and see how hard they are pushed into it by the acceleration. If you don't have gravity just make your own.

  35. Endless Surprises

    Endless SurprisesPred 4 meseci

    I wish you had been my science teacher.

  36. M.S

    M.SPred 4 meseci

    I am the last one

  37. matīss

    matīssPred 4 meseci

    why my teacher can't explain things like that?

  38. Apple I

    Apple IPred 4 meseci

    Me: Seeing Inertia Me 2 seconds later: *Singing Bill Nye the science guy because they heard inertia is a property of matter in the song.*

  39. Apple I

    Apple IPred 4 meseci

    Who else had Bill Nye the science guy intro in their mind when you saw inertia.

  40. Martyn Lamb

    Martyn LambPred 4 meseci

    Does the spring not fatigue over time and slowly but surely, give an incorrect measurement?

  41. FrogEater420

    FrogEater420Pred 5 meseci

    who else here from an actual science class

  42. Nothing\

    Nothing\Pred 5 meseci

    Funny I should come across this. I was just wondering this question myself earlier today. The best I could come up with was to spin the astronaut and measure how much energy it takes to spin them up to a certain amount of angular momentum. Then you could work out from the energy required and figure out the mass of the object, or person. Of course this is wildly impractical and inelegant. So I'm sure they've got something better. In retrospect, I'm sure doing the whole thing linearly instead of spinning the astronaut would work, as well. Get something to push them, then measure their speed and how much energy the device put into pushing them and you should get a good idea of how much mass you just moved.

  43. lol lol

    lol lolPred 5 meseci

    I mostly learn things from youtube than school

  44. Aze

    AzePred 5 meseci

    .... Um, inertia IS newton's first law. You're literally talking about the same thing. "Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia." - NASA "in·er·tia 1. a tendency to do nothing or to remain unchanged. 2. (Physics) a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force."

  45. Ray Seo

    Ray SeoPred 5 meseci

    I never thought I would actually see someone who worked for NASA play on a baby playground while they’re still in adult

  46. Ray Seo

    Ray SeoPred 5 meseci

    Imagine just be walking in a park and then seeing An adult playing in a playground by himself

  47. Jason Wedge

    Jason WedgePred 5 meseci

    Thank you so much.

  48. Brown Sugar

    Brown SugarPred 5 meseci

    Ha ha we pulled off the table cloth he said by the way do you not try this at home but try this at home

  49. gangstreG123

    gangstreG123Pred 5 meseci

    An educational video by a NASA-level engineer, in 2020, and we still have video interlacing. Also why does he sound like a guy about 3-4 drinks in at a party?

  50. Michelle Holmes

    Michelle HolmesPred 5 meseci

    I think I got it I’m on clue 2. The astronaut will stand on something that pushes them to a scale that will sense the momentum

  51. Buttifranz100 Og 1

    Buttifranz100 Og 1Pred 5 meseci

    I wish he was my real techer😃

  52. Max Crawford

    Max CrawfordPred 5 meseci

    What is it called when you lift 5 pounds 100 times instead of 500 pounds once?

  53. Michele Godlevski

    Michele GodlevskiPred 5 meseci

    Thanks for the shout out from a female scientist. :-) Oh,and I've been having fun quizzing my engineer husband to see if he knows the answer to your questions before he sees the video.

  54. Mrbee1

    Mrbee1Pred 6 meseci

    Bro I’m a boy

  55. Yzabelle Kristín Úlfarsdóttir

    Yzabelle Kristín ÚlfarsdóttirPred 6 meseci

    All science teachers could never

  56. James Ivan Salvador

    James Ivan SalvadorPred 6 meseci

    im asking my self why i am watching this in the middle of our bible class i also dont know cause i dont really know

  57. TrueVexus

    TrueVexusPred 6 meseci

    I thought it was as simple as inertia and math

  58. Spinx Gregorio

    Spinx GregorioPred 6 meseci

    me sees a cool title watches the whole vid until u realized that the answer is just the horse at the playground

  59. Jonah Varkul

    Jonah VarkulPred 6 meseci

    Mark: just reflect the hammer out of the way easy. Me: sure mark.

  60. Erin Bruder

    Erin BruderPred 7 meseci


  61. Erin Bruder

    Erin BruderPred 7 meseci


  62. LifeExplained

    LifeExplainedPred 7 meseci

    Woman runs around neighborhood Sees Mark Rober on a five year old toy

  63. Emily Wilson

    Emily WilsonPred 7 meseci

    This is fantastic and perfect for my 8th grade science unit on Mass/Weight/Gravity! Thank you!


    GRACE HARDYPred 7 meseci

    You should try skate boarding but learning like sciencey and stuff

  65. Valdas Kulikajevas

    Valdas KulikajevasPred 7 meseci

    Mark would be the best teacher out there!

  66. Ubi Dubi DOO

    Ubi Dubi DOOPred 7 meseci

    is there friction in space??? pls reply :(

  67. Seknd

    SekndPred 7 meseci

    Please do More of these

  68. Jeramie T

    Jeramie TPred 8 meseci

    Tip for ketchup bottles. Open the lid and squeeze the bottle a little and close it back up while still squeezing so that the pressure in the bottle is lower than atmospheric. And now when you open the lid after moving the ketchup to the opening, it will not spew out everywhere . Also, I sling the bottle while holding the base and use centrifugal force instead of acceleration and deceleration lol

  69. G A

    G APred 8 meseci

    So the people who work for NASA ... that killed people .. anyhow .... now do this ... ok ))) now the space shuttle’s make sense!! ... oh not

  70. G A

    G APred 8 meseci

    Drugs ... ?

  71. G A

    G APred 8 meseci

    Welcome back to an adult child ...

  72. Asian pepperoni

    Asian pepperoniPred 8 meseci

    thank god this si here i am having a hard time learning newtons law

  73. CrucifiX XX

    CrucifiX XXPred 8 meseci

    Anyone here from a comment from Daily Dose of Internet

  74. Clegy

    ClegyPred 8 meseci

    This is Grade 8 highschool physics right here

  75. The Drawn Potato

    The Drawn PotatoPred 8 meseci

    1m IQ organic human and hello, I'm fellow organic human

  76. M N

    M NPred 8 meseci

    These are wonderful, I don't think they need to be Live to be honest! So you can take your time to make them in a way that is convenient, because these classes are excellent (I have a degree in aero engineering and I still find them engaging 😄)

  77. GG’ S

    GG’ SPred 8 meseci

    Me quiting science to learn more from this

  78. Draw - Gon

    Draw - GonPred 8 meseci

    That ball didn't stay where it is come on mark

  79. College Stuff

    College StuffPred 8 meseci

    not your best work homie

  80. Christopher Krause

    Christopher KrausePred 8 meseci

    Can confirm, mark rover would be an absolutely amazing physics teacher. Any school would be lucky to have him

  81. CrumblingCookie

    CrumblingCookiePred 8 meseci

    ''mass is what matters'' the physics dads snicker in the background

  82. uchka uchral

    uchka uchralPred 8 meseci

    5:56 my guess is by being pushed or somethins similar

  83. 5K Subscribers Without Any Video

    5K Subscribers Without Any VideoPred 8 meseci

    *This dude is better at explaining than all my teachers, combined*

  84. Name Here

    Name HerePred 8 meseci

    Wait so if we went to Mars I can finally be able to dunk on 10 feet?

  85. Syco

    SycoPred 8 meseci

    I am 13 and you teach me more than i need to know

  86. Mark Lynch

    Mark LynchPred 8 meseci

    You are good man.. Keep it up

  87. Rose Pena

    Rose PenaPred 8 meseci

    This is what we are learning now so I showed my teacher

  88. Rachel Sortino

    Rachel SortinoPred 9 meseci

    As a physics teacher, I love these videos and would love to use them in my classes, but the auto-captions that they currently have do not meet ADA standards for my Deaf and Hard of Hearing students. SLthrow makes it pretty easy to go through and edit the captions for grammar and accuracy (ie adding punctuation and correcting any words that did not transcribe properly). I know some of your videos have full and proper captions, would love to see that for this video as well!

  89. SBerT

    SBerTPred 9 meseci

    20:13 Oh my god Mark Rober Mars Rover Is it mind blowing or what? 😱

  90. Keep It Simple

    Keep It SimplePred 9 meseci

    Rober's First Law of Motion : "Objects are lazy" 😂

  91. Caroline Patricia

    Caroline PatriciaPred 9 meseci

    I'm not even interested in science but I've always been following his experimental videos and istg if he's the teacher for my science class I'd understand better the way he explains things and all that

  92. Leo Etgen

    Leo EtgenPred 9 meseci

    he knows me

  93. killer bee

    killer beePred 9 meseci

    Please make some more

  94. MrRandom

    MrRandomPred 9 meseci

    Imagine what that person jogging with their dog at the playground thought of Mark on the spring thing

  95. Sophie Sellers

    Sophie SellersPred 9 meseci

    can you become my high school physics teacher. pls

  96. Brian Dalton

    Brian DaltonPred 9 meseci

    Video idea here: DemolitionRanch on SLthrow has 2 videos on shooting a bullet threw a curved pipe and it works, maybe try to partner with him, honestly if your able to get ahold him he would do it any day he could. Then you give us the science on it and that video would be amazing. You could even try to partner with the slow mo guys and do clear pipes to watch the bullet travel.

  97. TheUnbidFox

    TheUnbidFoxPred 9 meseci

    Mark makes science fun WITCHCRAFT

  98. tedrose15Vlog

    tedrose15VlogPred 10 meseci

    Please ╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗ ║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣ ╠╗║╚╝║║╠╗║╚╣║║║║║═╣ ╚═╩══╩═╩═╩═╩╝╚╩═╩═╝ To Mark Rober

  99. Pradeep Keshwani

    Pradeep KeshwaniPred 10 meseci

    I wish my physics teacher taught me like this

  100. common

    commonPred 10 meseci

    teacher who all im seeing is mark rober

  101. Sharanya saini

    Sharanya sainiPred 10 meseci

    Attach a scale to the wall and launch yourself feetfirst with an acceleration of 9.81m/s at the scale at 90 degrees to the scale? Then take a measurement of the largest force that was reached...?

  102. Willom9

    Willom9Pred 10 meseci

    Mark simping

  103. -COOKIEZILA -

    -COOKIEZILA -Pred 10 meseci

    I imagined an astronaut being slammed back and fourth by ping pong rackets with a weighing scale taped to them

  104. Alex Torres

    Alex TorresPred 10 meseci

    Imagine running by a random Man riding a sea horse in the Playground lol

  105. David Ro

    David RoPred 10 meseci

    Could you do a video on the theragun? I was doing some research and I believe it is a simple percussion motor and companies are up selling their massage devices when it should be less than 100 dollars.