SCIENCE CLASS #5- How Do Astronauts Weigh Themselves?

Mark Rober

684 ਹਜ਼ਾਰ ਦ੍ਰਿਸ਼98

    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-

    ਨੂੰ ਪ੍ਰਕਾਸ਼ਿਤ ਕੀਤਾ ਗਿਆ 10 ਮਹੀਨੇ ਪਹਿਲਾਂ


    1. Mark Rober

      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!

      1. Nick E

        Is it possible to send a message in space

      2. batxvv bolor

        @Kevin Luo Uub

      3. Laila Danielle


      4. LifeExplained

        @Kevin Luo No, pens don't. Pens also don't work upside down. There is a special space pen that can be used in zero g. Watch What's Inside's vid

      5. Blu Witt

        I have a question Mark Rober: Ok, so if I 1v1 someone and I beat them 30-0 how much better am I then them, cause im not like 30 times, or infinitely times better because that would still be zero. Am I just “better” or is there an explanation to it?

    2. Sandro Francis Miranda

      "Objects are lazy" - ROBER, Mark 2020

    3. Flavio Goetz

      you could dunk a touchdown on the moon

    4. Eric R

      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!

    5. বিজ্ঞান ও প্রযুক্তি

      Thos are for kids. 13:15

    6. Aziz Fenais

      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 😋

    7. Nick E

      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

    8. Moneyiscoollol

      13:35 Voice crack

    9. jon vw

      Simply, Thank you!

    10. Samuel Rogers

      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.

    11. Endless Surprises

      I wish you had been my science teacher.

    12. Ugzzz

      I am the last one

    13. matīss

      why my teacher can't explain things like that?

    14. Apple I

      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.*

    15. Apple I

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

    16. Martyn Lamb

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

    17. Texas Red

      who else here from an actual science class

    18. Nothing\

      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.

    19. lol lol

      I mostly learn things from youtube than school

    20. Aze

      .... 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."

    21. Ray Seo

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

    22. Ray Seo

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

    23. Jason Wedge

      Thank you so much.

    24. Brown Sugar

      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

    25. gangstreG123

      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?

    26. Michelle Holmes

      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

    27. Buttifranz100 Og 1

      I wish he was my real techer😃

    28. Max Crawford

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

    29. Michele Godlevski

      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.

    30. Mrbee1

      Bro I’m a boy

    31. Dmon1Unlimited

      @6:34 is that why you see some videos of big ships crashing into ports? Where the captain likely underestimated the distance needed to slow down e.g. instead of stopping at 15 miles they stopped at 10miles

    32. Yzabelle Kristín Úlfarsdóttir

      All science teachers could never

    33. Mr Ponkan PH

      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

    34. TrueVexus

      I thought it was as simple as inertia and math

    35. Spinx Gregorio

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

    36. Jonah Varkul

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

    37. Erin Bruder


    38. Erin Bruder


    39. LifeExplained

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

    40. Emily Wilson

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


      You should try skate boarding but learning like sciencey and stuff

    42. Valdas Kulikajevas

      Mark would be the best teacher out there!

    43. Ubi Dubi DOO

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

    44. Sebastian Knobling

      Please do More of these

    45. Jeramie T

      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

    46. G A

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

    47. G A

      Drugs ... ?

    48. G A

      Welcome back to an adult child ...

    49. I am Asian

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

    50. CrucifiX XX

      Anyone here from a comment from Daily Dose of Internet

    51. o0 COOLGUY24 0o

      This is Grade 8 highschool physics right here

    52. The Drawn Potato

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

    53. M N

      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 😄)

    54. GG’ S

      Me quiting science to learn more from this

    55. Draw - Gon

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

    56. College Stuff

      not your best work homie

    57. Christopher Krause

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

    58. CrumblingCookie

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

    59. uchka uchral

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

    60. 5K Subscribers Without Any Video

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

    61. Name Here

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

    62. Syco

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

    63. Mark Lynch

      You are good man.. Keep it up

    64. Rose Pena

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

    65. Rachel Sortino

      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. PAprom 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!

    66. SBerT

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

    67. Keep It Simple

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

    68. Caroline Patricia

      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

    69. Leo Etgen

      he knows me

    70. killer bee

      Please make some more

    71. MrRandom

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

    72. Sophie Sellers

      can you become my high school physics teacher. pls

    73. Brian Dalton

      Video idea here: DemolitionRanch on PAprom 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.

    74. TheUnbidFox

      Mark makes science fun WITCHCRAFT

    75. tedrose15Vlog

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

    76. Pradeep Keshwani

      I wish my physics teacher taught me like this

    77. common

      teacher who all im seeing is mark rober

    78. hermione jean

      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...?

    79. Willom9

      Mark simping

    80. -COOKIEZILA -

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

    81. Alex Torres

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

    82. David Ro

      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.

    83. ali mir

      Make a rail gun plz

    84. Suzanne Hogendoorn

      1Q 1

    85. Alexander Christofi

      When the only online lecture you attend is Mark Rober's.

    86. Antoinette Marlow

      OK Markie - I am a 65 yr old "girl" who loooooooooves your channel! How about that!??

    87. Maulik Mohnish

      Well you are the best today is my test this cleared my all doubt and I am from India 🤓

    88. Adam Khurshid

      I feel he should not have said that the middle east is "less progressive" womens right wise. Because in islam (main religion of middle east) women are equal to men. Just they are not supposed to be "too close" . but it is fine that you thought that

    89. Daniel Logan

      Mark: objects are lazy Machines made of objects: am I a joke to you

    90. Josiah Whitehill

      4:24 I never knew that they had tomato ketchup during Newton's time...

    91. Mannat Dawani

      The woman in the back jogging be like What is wrong with today’s generation 🤦‍♀️

    92. MSKD

      can someone please ask the caribiner to stop moving 😂

    93. Harrys Kydon

      (Guess before watching it) They use bands(out of rubber probably) that apply 1 g of force to them towards the scale?

    94. Elliotnim

      Bad astronauts get put in the astronaut shaker

    95. Catalina Zambrano


    96. person2234 I'm,a,person

      Are you reading cards.

    97. GD Bearky

      13:17 imagine what that person is thinking

    98. dirty crime boy

      Bruh I would rather be taught by mark rober than my science teacher

    99. Shivpriya Kadam

      Isn't ketchup a non Newtonian fluid??

      1. Bird Bird

        I personally don’t think so but it’s very likely

    100. Tiny Butterfly

      Can’t wait for new video! Hope it is good because you talking more than 1month to post hehe!