Newton's Laws of Motion - Physics 101 / AP Physics 1 Review

Newton's Laws of Motion - Physics 101 / AP Physics 1 Review - Dianna Cowern

Рет қаралды 198,384

3 жыл бұрын

Lesson 4 (Newton's Laws of Motion) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you!
Exercises in this video:
Problem 1: You push your square space cow, mass 5kg, with a force of 10N. What will be the acceleration of your space cow?
Problem 2: Your tiny cow has a mass of 1kg and is standing in a field in Kansas. What force does Earth’s gravity exert on the cow?
Problem 3: You are suspending two cows from the ceiling, one below the other. You have really strange hobbies. The lower cow has a mass of 2kg. The upper cow has a mass of 1kg. What is the tension in the rope between the top cow and the ceiling?
Problem 4: Now you have two square cows, one mass 4kg, the other mass 2kg, lined up on a frictionless surface. You push on the first cow such that the two cows accelerate at 2 m/s^2. What force does the second cow exert on the first?
Special thank you to astrophysicist and folklorist Moiya McTier for her shoutout at the end of the video! Find Moiya on Twitter @GoAstroMo
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Victoria C. Page - Video Editor
Sophia Chen - Researcher/Writer
Erika K. Carlson - Researcher/Writer
Levi Butner - Videographer
Hope Butner - Production Assistant
Darren Dyk - Slow Motion Cinematography
Andy Brown - Curriculum Consultant
Lauren Ivy - Set Design
Vanessa Hill - Consulting Producer
Aleeza McCant - Illustrator
Alicia Cowern - Transcription
Consultant - Kyle Kitzmiller
Lucy Brock, Samantha Ward - Curriculum Consultants

Пікірлер: 563

@saucerset12 3 жыл бұрын

I started my physics degree at 44 yrs old. Got it in '19 and now I am working on a BS in Mechanical Engineering. It's NEVER too late to start learning.

@ligh7foo7 3 жыл бұрын

hurray, I am 39 and attempting the same thing. Well I need to get through the year 11 level of physics first then I will progress to bridging courses and a degree.

@davewilson13 3 жыл бұрын

I had a 66 year old working on his PhD when I was an undergrad, never too late!

@Arun-nt4kv 3 жыл бұрын

Way to go. 👏

@StayPuft787 2 жыл бұрын

The heck you use it for ?

@saucerset12 2 жыл бұрын

@@StayPuft787 What ever I want. I'm retired so I do it because I enjoy learning.

@physicsgirl 3 жыл бұрын

Best example I've ever seen of inertia: when astronauts just LET THINGS GO in the space station, and they don't fall. (Astronaut Tom Marshburn made a fun parody video doing an interview back on earth where he dropped a cup "forgetting" gravity was there. It's great.)

@brycering5989 3 жыл бұрын

lol, "ohh right, Gravity, but can I still use the hose, it makes me feel safe" ;) On a side note, on point, I am a Bus operator. I have seen many of these laws of motion (Inertia) in person (we all have as drivers Riders etc). one time was when I was a kid on a school bus, The driver had to stop quickly, I was on the middle seat down the back of the bus. The bus stopped, but I slid (Still in the seated pose) down the wet aisle towards the front of the bus, I wonder What the others though as I magically transported past them in that seated posse.

@YugamAggarwal 3 жыл бұрын

Thank you teacher for taking Class xD.

@infinity6678 3 жыл бұрын

I am from India Loved your video Watching it at 2:00AM

@physicsgirl 3 жыл бұрын

@@brycering5989 That's great imagery, I laughed out loud. I wonder how many people have ended up in awkward situations because of Newton's 1st Law.

@physicsgirl 3 жыл бұрын

@@infinity6678 2am?? Newton's laws can wait.

@berlintour4712 3 жыл бұрын

3:50 Hermoine: It's leviosa not leviosaaa!! Diana: It's inertia not inertiaaa!! BTW really love the way you teach!! Thanks 😊

@FatManWalking18 3 жыл бұрын

delightfully ripped off from A Fish Called Wanda with Archie's daughter "Portia" [john cleese's actual daughter]

@HarryPotter-no5jw 3 жыл бұрын

I couldn't stop laughing at this

@Ginga7r 3 жыл бұрын

I wish I had you as my School Teacher who has made learning fun, Thank you so much I've learned a lot.

@ehomelessvillageidiot3051 3 жыл бұрын

Unfortunately most people teaching science didn't want to teach science and only started teaching it because that was the only option as it was the only position open. Many of them barely passed the science classes necessary to earn their degree. Let that sink in.

@hrithikgeorge4751 3 жыл бұрын

Eegore Beaver *Opens door*

@ehomelessvillageidiot3051 3 жыл бұрын

@@hrithikgeorge4751 I'm confused? 🤔🙄🤪

@deepakjoshi823 3 жыл бұрын

I wish the same! 😊

@deepakjoshi823 3 жыл бұрын

@@stratoinc.5531 I can easily figure out what's going on in your mind! 😠

@advideos3953 3 жыл бұрын

i wish you were my physics teacher. you just make everything simple, THANKS

@advideos3953 3 жыл бұрын

OMG! She liked my comment. OH MY!!! Thanks

@avidnongetit8710 3 жыл бұрын

Sincerely, Thank You. I had a very mean math teacher as a young person. She terrified me about my self worth and math ability. But as a grown up I am delving into math with quiet gusto. For myself, your gentle enthusiastic lessons are easy to follow, easy to comprehend, and excite me about physics. A subject I firmly believed I had no business researching, though life is not interesting without examination...

@suzannestrickland1586 3 жыл бұрын

I always feel smarter after these. Partly because I learn new things and partly because I already knew some of it.

@gjcebelak8315 3 жыл бұрын

19:31 did you actually call them "cowculations?" Brilliant!

@sitarnut 3 жыл бұрын

Right on gj...How can one not love this girl...humor, plus cool science...I bet she has all Gary Larsen's cartoon calendars and books...

@aditipandey7748 3 жыл бұрын

I think Diana's drawing is improving. 👍 And with that our Physics is improving. Thanks Diana

@thomasewing2656 2 жыл бұрын

Don't forget to give those silly cows some credit!

@nicolashabak7299 3 жыл бұрын

A haiku of my favourite things in physics: An ideal gas Assume frictionless surface A laminar flow

@brycering5989 3 жыл бұрын

"a cow, we'll make it a square cow for simplicity" me; lol, that is strange "I actually have a square cow! me, lol, lol. still strange, but yeah, it's cute :D

@Lukiel666 3 жыл бұрын

You can use it to illustrate the square - cube law!

@heckler73 3 жыл бұрын

I prefer my cows to be spherical... _for simplicity_

@FatManWalking18 3 жыл бұрын

like the spherical chicken in a vacuum joke?

@JefesGarden 3 жыл бұрын

What a perfect object to illustrate mooooooovement! 🐄

@richardperritt 3 жыл бұрын

3:43 Dianna channelling her inner cat. 😹

@physicsgirl 3 жыл бұрын

Haha! This is exactly what it made me think of. I'm glad someone else picked up on the cat-ness of that move.

@DavidTaylor-nz7ts 3 жыл бұрын

Thank you, this will be making an appearance in my 8th grade, Physical Science classes. Hopefully, we'll be back to in-person by then (spring semester) and they can manipulate/work with their own version of tiny cows to explore Newton's Laws.

@angelalewis3645 Жыл бұрын

Dianna, you are such a delight! Thank you for these lessons!

@J.Tronix 3 жыл бұрын

If that’s physics 101, I’m going back and getting my engineering degree... I can’t stand accounting any longer

@rawfiul. 3 жыл бұрын

yeah? why is acceleration m/s^2 and not just m/s ?

@invinate 3 жыл бұрын

@@rawfiul. m/s is velocity

@victormpapuluu6497 3 жыл бұрын

Hi I quit accounting in a university to go get a diploma in mechanical engineering in a polytechnic.😉 Follow your interest man.

@chrispeoples4606 3 жыл бұрын

@@rawfiul. Velocity is how fast, or the rate of change of an object's position with time, expressed with units of m/s. Acceleration is rate at which velocity changes with time, or how fast 'fast' changes with time, units of (m/s)/s or m/s^2.

@animikhaduttadhar2284 3 жыл бұрын

Velocity is not just distance/time. It's that magnitude in a specific direction, that's what makes it a vector. And more often, you'd see it written as displacement/time. Acceleration is simply the rate of change of velocity (which is the rate of change of displacement covered with respect to time) with respect to time. That is saying how much did my velocity change in a certain amount of time. So, if I was travelling at a velocity that would help me cover 3ms in 1 second (3m/s), now, I'm travelling at a velocity that will help me cover 5ms in 1 second (5m/s). And let's say this change happened in 2s. Then the acceleration comes out to be 1m/s^2. That is simply saying in every second that my velocity changed, it changed for 1m/s. Initial velocity here would be 3m/s for it is the velocity I was moving with initially and then it changed to 5m/s in the span of 2 seconds and 5m/s is the velocity I'm moving with finally, or at least in the context of this example. Hope this helps clear things up. Ask me questions if you have any.

@techhelp1941 3 жыл бұрын

Every time order of differentiation changes....nicely explained Diana.

@diyathegr8 3 жыл бұрын

This was a pretty cool way to sum up the entire 3 laws... I really liked how u added bits and pieces of random information in between (so seamlessly)... And thanks for showing how to approach physics problems... This has changed my perspective towards questions that seem clueless in the beginning and has helped me solve harder problems..

@Gulkrom 3 жыл бұрын

Since I found your channel I am in love with physics, I love your enthusiasm, awesome content, greetings from Chile

@sschmidtevalue 3 жыл бұрын

I love this even though I have trouble following the math. It's been over 40 years since I had algebra and I have only used a smattering of it since then. In any case, I love your enthusiasm. Keep 'em coming!

@1174juanamaya 3 жыл бұрын

I’ve learned so much more watching you explain physics, thank you🌹❤️

@eccentricOrange 3 жыл бұрын

How are your explanations so lucid? Absolutely love it (and the quadrilateral cows too)!

@johnholmberg7302 3 жыл бұрын

I never thought I would say this about a youtube video but I like the how it makes me feel like im back in a classroom. now that all my classes are online I actually miss being in a classroom and these videos give me something to look forward to.

@carlbarker7368 3 жыл бұрын

I want to simply just say thank you to your motivational and fun introductions into physics. If you can explain it in your own words, which you are a genius, it makes it so much easier to follow and understand. I feel so great about what I learn that I feel like I can takle the problem of theory of everything😁

@rubixstars 3 жыл бұрын

Even I wish I had you as my physics teacher, you make everything so simple to understand! Thank you for helping me! Tomorrow I have an exam and watching this video will definitely help me tomorrow, thanks again!

@John-ci8yk Жыл бұрын

Thank you for all the time and effort you put into your videos, thumbs up.

@musicmanmatt87 3 жыл бұрын

Thank you so much for doing this! I hope it helps a lot of people in school and out of school understand the universe.

@h7opolo 3 жыл бұрын

3:50 lol you mock me. that's the type of comment i would leave, i.e., correcting grammar. lol

@AstronomywithManas 3 жыл бұрын

The way you teach is very fun and it feels we are watching the most quality and informative content.😃😃

@sopasopa1037 3 жыл бұрын

I am so grateful you posted this, you are going to save my Physics exam

@Taran72 3 жыл бұрын

Loved your video!!! It's interesting, fun and clear in the way you speak. Just perfect. 👍

@TheBinarydeity 3 жыл бұрын

Incredible video. Thank you for the information. Very useful.

@Malmo117 8 ай бұрын

May the force be with you Dianna! 🙏🙏🙏🌸

@daveoatway6126 3 жыл бұрын

Delightful! And excellent teaching. Thanks

@arulgupta1639 3 жыл бұрын

it's just amazing how you can teach every chapter in around 20 min whereas in school it takes the teachers about 1 week or so pls keep teaching us the same way you are right now. it's just mind blowing.🤩🤩

@jhwieder2112 3 жыл бұрын

Thank you for all of your great videos. I teach 7th-grade physical science in NJ, and I'm always thrilled when I can show my female students, strong female role models. You are an inspiration. With a little pre-teaching, most of my students really get you. Thanks again. Keep up the great work.

@geraldsnodd 3 жыл бұрын

You have done a great effort ma'am. The history of STEM subjects is quite male centric.I am a 10 th grader. I struggle to bring female role models for inspiring my fellow female students,but my teachers do not make this effort.

@scintillatedgaming7548 3 жыл бұрын

You are good at explaning!! Thank you for the video!

@osmosisjones4912 3 жыл бұрын

Panels on wheels within a fluid with in pipes with in the walls. Would move the mass of the ships in certain detection . combined with conventional rockets behind

@connorbecz3036 3 жыл бұрын

You are really starting to own the show and make it your own. Great series!

@joaodionizio1280 3 жыл бұрын

Parabéns pelo trabalho! 👏👏👏

@anusmitaguria6549 3 жыл бұрын

You made our learning so much fun and understandable.... 😀

@boston1314 2 жыл бұрын

I'm 1/3rd through this video. I understand Newtons Laws better than I did 40 years ago in High School and is why I opted out of College. I love Physics understand the concepts but could never explain them. I can solve Physics situations But dont know how to explain how I did it. You are Awesome. I wish I had a teacher then as passionate as you. It would have changed my life.

@infinity6678 3 жыл бұрын

when someone slaps me he also get slapped technically by my face and this is action reaction !

@avidnongetit8710 3 жыл бұрын

That was Hilarious! Sincerely

@amacro11 3 жыл бұрын

I thought I was too cool for school, now I must start again Thanks for your most clear explanation Al

@sakios4094 3 жыл бұрын

Your methods are easy to understand. If all my physics classes were like this, I wouldn't be scared of physics anymore.

@bobjackson6669 4 ай бұрын

Loved the physics 411. I shared this with my grandsons age 10 and 6. They love your videos.

@djarp1772 3 жыл бұрын

Im 11 and I find this stuff so cool. Thanks

@jigneshagrawal6597 3 жыл бұрын

It takes about 6hrs of school classes to understand all that and you did it in 20 min amazing

@cjmenagh882 3 жыл бұрын

Nice video. Introducing the concept that inertia is what imparts mass, just like the Higgs field does, cool.

@vladkindfox1321 3 жыл бұрын

....i knew this things...laws and everything....even about baloons...but your explanation is so good) You're a breathtaking! Love you! ❤️

@camilazoroza1742 3 жыл бұрын

You are literally going through the things I'm studying right now. In almost the same order 😂 Thank you for giving me the basics 💜 ...and being a role model of women in science

@serviceoverself2375 3 жыл бұрын

You are an amazing tutor. If you were around in my time I probably would have derived a physics formulae.

@jackleejonesjr.2995 Жыл бұрын

Dianna I love most all your stuff... The stuff I don't like is just because I love you! Happy Physicing!!!!

@tmann986 Жыл бұрын

I’ve taken some math classes, two semesters of physics, and now im in engineering statics class. I need to come back to have a better understanding of forces. I love learning ❤

@cupid111aby 3 жыл бұрын

Your channel deals with my favourite subject. I loved your channel and you too,sis

@jozsefizsak 3 жыл бұрын

It's great pleasure to see your enthusiasm for physics in these highly informative and entertaining videos. I completely relate. The one change I would suggest is to do away with the currently fashionable sudden, startling whooshing noises that sometimes accompany an edit or small visual effect. I think my preference not to be startled in this manner is likely not unusual and the experience is distracting and disruptive for no useful purpose. Anyway, keep up the (otherwise) wonderful work! Love the square cows too. 😉

@jahnvisingh8015 3 жыл бұрын

This video is like a blessing for me Next week I am having my physics exam and I was quite worried about this topic. But now I am stress free because who else could be a better Physics teacher than Miss Diana😇 Thank you for making this video 🤗

@matthewsaulsbury3011 3 жыл бұрын

Wow, this is awesome and fascinating! 👍🏻😀

@tjfritts9013 3 жыл бұрын

Excellent presentation, making the intimidatingly smart more accessible for those of us with the incredible dumbness. I thank you. :)

@eleanorfreebern8945 3 жыл бұрын

🤩I am learning so much!

@liriamatsuzawa5742 3 жыл бұрын

You're awesome!!! I'm Brazilian and I'm watching your video like "OMG, THIS IS AMAZING" hahaha I've never thought that physics could be fun and easy hahahah! Love it!

@Birdmanondaweb 3 жыл бұрын

Talk about perfect timing. I'm just about to start my physics homework focusing on Newton's Laws. :)

@piguyalamode164 3 жыл бұрын

Random technicality that doesn't really matter: The newtons third law force equal and opposite to earths gravitation effect on you is not the force that pushes you up from the ground. That honor goes to your(absolutely miniscule) gravitational influence on the earth. The force pushing up on you is a completely unrelated force that has to be the same as the force of gravity due to physical reasons(similarly to how the rope must have a tension force because you can't just pull a rope apart). The force pushing up on you in your chair is called the Normal force(the worst name ever). You can do several experiments to prove that it is not the same as gravity. The easiest is just to put something that can slide on a sloped surface. You will observe that the object accelerates down the surface, which means it must be experiencing a net force(parallel to the sloped surface) and it must be caused by gravity or the normal force because those are literally the only two options, so the normal force cannot be equal and opposite to gravitation. The normal force does have a third law compliment, because the normal force can be thought of as the force that stops you from falling through the earth, and the third law compliment is the force that pushes the earth away from you as a result(exactly countering the third law compliment of earth's gravitational pull on you)

@samhatman6536 3 жыл бұрын

You might have guessed, if you knew me, I did not take High School Physics because I nearly failed Chemistry, nearly failed Trig, and elements of Calculus, I had to take Algebra three times. But the Cows are cute!!! I am going to look up and buy those little cows because you and they help me understand. You have a hard earned gift of teaching. I am so glad you teach us. I slow down the video for comprehension, cause my math mind is so slow. But it works! Thanks!! Everybody is benefitted by your work. Just Awesome!!!

@madhunayak165 3 жыл бұрын

I love your teaching and your t-shirt....wonderful video😀🥰😀

@Chapusse 3 жыл бұрын

Thanks to your very cute square cows and your cleverness and pedagogical clarity, now I understand the classical laws of motion much better. Thanks, physics girl!

@jlpsinde 3 жыл бұрын

Great video! Love you

@divinaelbo9386 3 жыл бұрын

Hi, Diana. Thank you for making these videos. Where did you buy the mini digital scale?

@TheOddsMustBeCrazy 2 жыл бұрын

Question regarding the second law. Consider a 10-ton truck, going a steady 60 m.p.h, F=ma suggests it has no force, because the truck isn't accelerating. If I got hit by that truck and the paramedic told me the truck had no force, I would have a hard time believing him/her. How would the paramedic be right, or would they?

@praveens9014 3 жыл бұрын

Even my teacher didn't explain this in detail,she blew up this topic 😂. Thank you

@Chahal654 2 жыл бұрын

Thanx 🙏🏻🙏🏻 and I'm from india just love the way your explanation about concept

@nwimpney 3 жыл бұрын

I'm not a physicist, but I have a hunch that the bottle trick is not creating gas bubbles, but vacuum bubbles. There's probably a little bit of boiling going on, but the reason the impact is so sharp as to break the glass, is because there is no gas to cushion it, you have the bottle and water being pushed together by both atmospheric pressure, and maybe some extra pressure trapped in the top of the bottle, and nothing is there to slow it down before it hits the glass, and because the water is almost incompressible, all of that inertia is dissipated in the very instant they hit. Any boiling and re-condensation that occurs, will actually spread out the impact. and make the glass less likely to break.

@kristyholben9217 2 жыл бұрын

Where did you get the cubed cow??? I have been looking all over for a set of cubed farm animals to use in class, but I cannot find any that size. Thank you for your fun videos!

@depressed_neutron 3 жыл бұрын

Thank u just came from online class abt the same thing but didnt understand even a thing but now i understood

@GreggGies 3 жыл бұрын

Brilliant. That's a better explanation than I got in university.

@shaun138 3 жыл бұрын

Braille Army represent!

@dripcode2600 3 жыл бұрын

Love your video!

@cesarvidelac 3 жыл бұрын

I wish I had a teacher like you when I was in school! The math and method to teach were sooooo boring I almost fell sleep... Great video!

@karanchauhan355 3 жыл бұрын

Do take Rotational motion in upcomig classes its very interesting. I love solving those question .

@alakas706 3 жыл бұрын

great video, tho I have this to say. Im now done with high school and physics. but one thing I remaber took me a long time to really understand is that the complimery force for the gravitasjonal pull from the earth to your mass, is a gravitasjonal pull from you to the mass of the earth. Idk if it was just something I had troubles with. maybe something to mention or go thru in the series?

@AARHEAD191 3 жыл бұрын

I just stumbled across your video about quarks, old but loved it. I really wanted to read the blog post you mentioned "10 quirky facts about quarks" but the link was dead. do you or anyone else have a working link to the post?

@kaideng2571 3 жыл бұрын

Perspective is important when it comes to understanding forces.

@physicsencyclopedia 3 жыл бұрын

Very well explained

@habiburrahman4911 3 жыл бұрын

Fantastic lecture Dianna madam 🌹💓💞 God bless you..

@dr.x4698 3 жыл бұрын

Love From India!! Dianna 🧡♥️ Just Be Happy keep smiling like this And keep Physicsing!!😊

@Shihab1979 3 жыл бұрын

Thank you very much

@raheebr2438 3 жыл бұрын

I love this series! You make physics so much fun and very interesting to learn! I love the guest speakers at the end as well! Looking forward to future episodes! So excited to see whats next! 😀

@daxpaulino 3 жыл бұрын

Nice lesson COWern! MOOchas gracias! :)

@shadeeduliqaab 2 жыл бұрын

Thank you so much❤😊

@Walterbrown1 3 жыл бұрын

Thanks!

@devnandanmahapatra440 Жыл бұрын

Thank you ma'am

@nickdiamond7595 3 жыл бұрын

Fun with F=ma. Once again Dianna, you are the best!

@seval9294 3 жыл бұрын

It is really perfect video🤩🤩🤩

@satyabehera8240 3 жыл бұрын

Nice video. But I think it is important to discuss the following when we teach Newton's laws. 1) Place a coin on the top of a closed fist. When we suddenly move the hand downward, the coin separates from the hand. Is it due to inertia of coin? If yes, then why does not inertia of the coin separate the coin from hand when we slowly move the hand downward? 2) Place a coin on the top of a book. If you pull the book hard, the coin " seems " to move in backward direction. Is it due to inertia of coin? Coin was at rest. In an attempt to remain at rest, it slips on the book. If it is true, then why doesn't inertia work when we pull the book gently? 3) A popular demonstration is card coin experiment (or different versions of it). Place the coin on the card placed on a glass. If you flick the card hard, the coin falls into glass. The explanation given is that the coin has inertia. It was at rest. Even if card moves, the coin remains at rest due to inertia of rest and falls into glass when it finds no card beneath. If this is true, then why doesn't inertia make the coin fall into glass when you SLOWLY flick? Does law of inertia valid when card is flicked hard and not valid when flicked slowly?

@dimal7439 3 жыл бұрын

The first one is because when you move your hand very fast you accelerated more than the acceleration that gravity induce to the coin so your hand it will move faster so it will separated from the coin. When you move it slow your acceleration is smaller, so the coin it will try to move faster, but your hand it will slow it down so the coin it will remain attached to your hand. The second one is because of friction when you move the book you gave it an acceleration, for the coin to have the same acceleration, a force must be imposed on it that will give the same acceleration if the friction between the book and the coin is lower than this force, then the coin it will not follow the motion of the book if friction is not lower, then it will follow the motion of the book. The third is basically the same with the second

@user-zt7ki7oc6l 3 жыл бұрын

The law of ternary balance: In a system, the process of two non-equilibrium states tending to equilibrium is the process of ternary equilibrium.

@garrycollins3415 3 жыл бұрын

I saw Moiya on the Impossible podcast. Very interesting story and career path.

@billdavis9286 3 жыл бұрын

I have a real world question for you. In space 'they' say there are particles that pop in and out of existence, what exposure to that environment would impact the constant motion of your otter? And would we deduce that influence exists if we knew the otters start and finish location, and compare with on paper calculations of where we would expect to find it after time (n)?....

@nobodyyouknow9839 3 жыл бұрын

I have very interesting question about motion at this point of course :- "Galileo was punished by the church for teaching that the sun is stationary and earth moves around it . his opponents held the view that earth is stationary and the sun moves around it .if the absolute motion has no meaning , are the two viewpoints not equally correct or equally wrong ? "

@animikhaduttadhar2284 3 жыл бұрын

Well, every invention or discovery has been improved upon. What he said was the most correct in those times. The main point we infer from his discovery is that the model of the solar system is heliocentric (sun is at the centre) and not geocentric (earth is at the centre) which remains true. It could be possible that I'm misrepresenting your question so let me know if that is the case.

@NetAndyCz 3 жыл бұрын

So, how is it with the astronauts and gravity and free fall? Do things accelerate due to the gravity? Or do they "stay still" and the spacetime moves with them and around them to a massive object such as planet?

@danielquirco1 3 жыл бұрын

I don't know if I commented this already. I'm a physics teacher, I don't need to watch these videos. But I do it for the pleasure of seeing Dianna's enthusiasm and charisma.

@edmiller5101 3 жыл бұрын

I should have taken Physics in school sounds very interesting. But I stuck with Biology classes and carries a 95 average in high school and a 3.5 GPA in college. You would have been my favorite Teacher/Professor.