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Circular Motion - Physics 101 / AP Physics 1 Review with Dianna Cowern

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Lesson 7 (Circular 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:
Problem1: You have a one kilogram ball on a two meter long string. You swing it in a circle so it goes around once every two seconds. What’s the tension in the string?
Problem 2: What is the magnitude of the centripetal force keeping the Earth moving in its orbit around the Sun?
Problem 3: The coefficient of friction between tires and the road is about 1.0. At what angle should we bank our road if the average speed of cars driving on the road is 80 km/hr? (Don’t forget to convert to m/s!)
Thank you to Derek Muller from Veritasium for his incredibly kind shout out at the end of the video, and for encouraging people to pursue physics! And thanks to Lizzie Armanto for letting me use her footage!
Credits:
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
Hope Butner - Production Assistant
Levi Butner - Videographer
Lauren Ivy - Set Design
Vanessa Hill - Consulting Producer
Aleeza McCant - Illustrator
Rachel Allen - Illustrator
Consultant - Kyle Kitzmiller
Lucy Brock, Samantha Ward - Curriculum Consultants
Cathy Cowern - Transcription
Velodrome Photo: flic.kr/p/cSkSDQ
Fritz Zwicky Portrait: www.zwicky-stif...

Опубликовано:

21 авг 2024

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Комментарии : 525

@eccentricOrange 3 года назад

I literally (and I don't exaggerate) can't find a better teacher!! Many Edutubers are AMAZING teachers; you should collaborate and create material for school curriculum that's both educative and engaging

@astrophiledevansh898 3 года назад

Like Vsauce, veritausium, kurkegzat etc. Literally they teach me more than school. If I were to choose being thought in school vs taught by one of these people I would choose RU-vid.

@eccentricOrange 3 года назад

These are the ones I have in mind: 3Blue1Brown, Ben Eater, CGP Grey, SmarterEveryDay, Physics Girl, Steve Mould, VSauce, minutephysics, Tom Scott, Veritasium and Crash Course

@melontusk7358 3 года назад

@@eccentricOrange Also don't forget Professor Dave Explains, Patrick JMT, Fermilab, Dr Physics A, PBS Spacetime, Doc Schuster, Professor Leonard, and MIT OpenCourseWare.

@yasharthgautam2821 3 года назад

@@eccentricOrange also Arvin Ash

@nitinpandey5753 3 года назад

These are good cicerone , but you guys should try to think more by yourself (give more time to think) so that it makes you great 👍

@pekame 3 года назад

Now I want to learn general relativity so bad ... you're so good at this

@physicsgirl 3 года назад

YES! This is the comment of my dreams. Thank you, I can die now.

@abhilashasharmasuman6800 3 года назад

@@physicsgirl Please don't!!!

@akashpallepati61 3 года назад

What is the doubt?

@localtitans4166 3 года назад

@@physicsgirl if u die how will u make the video

@dankuchar6821 3 года назад

You were like many of my best students. They love the complicated hard stuff! Relativity and Quantum p Physics are always fun because they really require us to stretch our brains beyond our everyday experience. I also do sections on acoustics and light and colors, many of the Liberal Arts students really love these sections. Just know to you Diana. You do an excellent job! Physics Girl rocks!

@timeverse1545 3 года назад

Queen of physics - RU-vid’s physics girl

@seriousthree6071 3 года назад

Sabine Hossenfelder is Queen, physics girl is the princess. Argue the toss if you want but go watch her physics videos.

@grandunification6226 3 года назад

@@seriousthree6071 i've watched few videos of both, though rating a person or their knowledge or channel is wrong, i say that the ranking of a teacher(any one who makes other's learn) not only depends upon how much knowledge they have and how much they are conveying without wasting time but also on how effective their lectures are

@seriousthree6071 3 года назад

@@grandunification6226 there are many potential ways of comparing RU-vid channel presenters. Not everyone will use the same standards. Even if they are then they may be biased.

@grandunification6226 3 года назад

@@seriousthree6071 that's why no one should rate a person ☺😊😊😊

@ravinayadav8247 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fvGNI52gkBE.html

@SoundFieldPBS 3 года назад

Dianna + Skateboarding = Peak RU-vid

@janardans3860 3 года назад

Diana Boarding

@Bassotronics 3 года назад

She looks like a skate border.

@apexscape 3 года назад

@@Bassotronics she surfs & snowboard

@Bassotronics 3 года назад

@ *D L* I knew it!

@alexisflory6496 3 года назад

@@apexscape so what you saying is she only needs the last one to complete the trifecta

@flyingark173 3 года назад

Fantastic video! I only wish I could understand it! You make physics simple, and yet at the same time you remind me why I dropped out of physics in high school. At 47 yrs old, I've missed my opportunity to be a scientist, but I feel, based on your videos, that if I had a tutor with your knowledge at the time, my education and subsequent career would have been vastly different from what it is today. Your videos are very inspiring and I hope that millions of young people are watching and using the knowledge that you impart to further enhance their lives. You are doing a great service to your fellow humans. Be proud of that and continue on inspiring young scientists. I know this probably flies in the face of everything you believe, but I thank God that you exist and you are helping to spread knowledge and understanding to a new generation. Sincerely.

@uchesamuel4061 3 года назад

I learn more physics here than my whole life in school...thank you Diana for doing this for us physics lovers❤️

@happyhome41 3 года назад

"Thank you physics" -- love it. Well done (information, well edited, well presented, easily digested).

@crazybrit-nasafan 3 года назад

The force IS strong in this one. Watch she does not join the dark (matter) side.

@astrophiledevansh898 3 года назад

But I would like if she did it.

@Valdagast 3 года назад

_For my ally is gravity, and a powerful ally it is. Planets creates it, makes them grow. Its energy surrounds us and binds us together. You must feel gravity around you; here, between you, me, the tree, the rock, everywhere, yes. Even between the land and the ship._

@johnchessant3012 3 года назад

I'm glad you included the derivation of mv^2/r. I wonder if there's an intuitive way to explain it to those who don't know calculus.

@muhammadhussainsarhandi9928 3 года назад

Here you go, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-NH1_sO8QY3o.html This is Khan Academy video where Salman Khan explains and derives the formula for Centripetal Acceleration just by intuition, this is the excellent explaination, you will really learn a lot from this video,

@muhammadhussainsarhandi9928 3 года назад

@ what do you mean?

@mattwhiting2205 3 года назад

Great stuff. And THANK YOU SO MUCH for such an understanding and approachable presentation of what centrifugal force is in a physics classroom. (I am campaigning for physics teachers to stop saying, "There is no centrifugal force." You explained it exactly the right way.)

@JB0528 3 года назад

A whole lot of this goes over my head, but I really do enjoy these videos. Thanks for the education =]

@BillBodrero 3 года назад

You, dear miss, are exquisitely, wonderfully, objectively awesome. Thank you for helping to create, and being the face of, such amazing content. You give me hope for future generations, and hope you continue to teach for many years to come. Thank you. Thank you. Thank you.

@math_the_why_behind 3 года назад

Thanks for these videos! I'm currently taking Physics this year, and I love the math and sciences, so I really appreciate this series.

@jack0cat 3 года назад

It’s hip to be square. 🤣 My friends think that I am a genius when they come over and I’m watching your channel.

@storyspren 3 года назад

"Today in intro to physics, we're doing megastructures." Coolest physics teacher :D

@ravinayadav8247 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fvGNI52gkBE.html

@Sohamsta 3 года назад

omggg i was literally learning this at school today, thank you so much

@hotflashfoto 11 месяцев назад

This is 2 years after you published this. I hope you are getting better. You have a spark for life and teaching and I really like your presentations.

@bhargaviprajapatii 3 года назад

I scrolled through Instagram while my teacher taught this, she's better than any physics teacher I've met

@bonchonjonjon 3 года назад

I appreciate you addressing the "oh so controversial" centrifugal force. Like many, it was taught to me as just fictitious but yes... things are not so straightforward.

@dr.x4698 3 года назад

YOU ARE GRADUALLY COVERING OUR NEET SYLLABUS!!

@KamalKishor-yo9ub 3 года назад

A great fan and your regular student from India 🌟👍.

@Saraseeksthompson0211 2 года назад

You should post the skateboard trick as the thumbnail because so many ppl will be interested in this! so good

@turpialito 3 года назад

Dianna and Jade from Up and Atom are among (if not) the most fun-to-watch, easy-to-understand physics videos on RU-vid. I commend these ladies.

@Fer-wr5xb 3 года назад

This has saved my physics grade singlehandedly.

@obiesbenefactor5058 5 месяцев назад

We miss you making new videos. Thank you for all those that you have put together to keep us occupied while you get better.

@richardperritt 3 года назад

Nice shout out for Ringworld. 👍👍 Awesome series BTW. Your presentation is the style I wish everyone could experience in formal school. It's makes what could be a dry, boring subject interesting. I remember my first physics lessons. On TV (remember that archaic device?) with Prof. Julius Sumner Miller. To me, a geek, it was the most interesting part of a little Canadian TV show (now with a huge cult following) called The Hilarious House of Frightenstein (starring, among a couple of others, Billy Van and Vincent Price).

@Self_Proppelled Год назад

Dianna is the best. Hoping we see much more from her.

@NelielSugiura 3 года назад

First thoughts about the motion of going in a circle and speeding up made me think of Furze's large donut where he rode around on the wall. Then you talk about bent space and I remembered that Veritasium did his video on that a few days ago. Great how all of RU-vid relates back to itself. :)

@ThoseMadFoxes4330 3 года назад

Oh, and the Shaolin “Rope Dart” is based on the principle of establishing a velocity in a dagger on the end of a rope, then decreasing the radius the dagger is swinging on in order to give the dagger more force when it’s released from its circular path (on the tangent of course). I’ve always thought that decreasing the radius made the dagger move faster, but now I see the dagger actually moves slower along its smaller radius, not just as fast in a tighter circle; it just completes more rotations per minute than before. I’m now trying to figure out why that would give it a higher velocity upon release O_O! So damn cool!!!

@tubeyoukonto 3 года назад

Thank you for correctly calling the INWARD force centripetal. In the past few years this universally accepted mistake has popped up in the internet: People call the outside force centripetal force. I mean, the clue is in the name. Centri -> center ; fugere -> fleeing => Fleeing the middle.

@papaowl13803 3 года назад

Dianna I just love going to school with you as teacher. You just explained the road ?. Some of the rest I know. But nobody ever has explained the force of the different road grades. Thanks Dianna

@ammaradil3796 3 года назад

Who needs online classes when u have Dianna to teach u. Your work is awesome Dianna Love ur phisicsing 💖💖💖

@samedwards6683 7 месяцев назад

Thanks so much for creating and sharing this educational and entertaining video. I hope that each day you are feeling better than the day before 🙏

@onehitpick9758 3 года назад

Keep in mind, we're just looking at galaxies and haven't seen them spin at all except for at the centers (such as Sag-A* time lapse and remote BH imaging effects). We've just seen some redshift/blueshift elsewhere on larger galactic scales -- nothing else. It's possible that galactic centers are actually hurling material waves outward like pinwheels, which generate periodic star bursts that tend to maintain their original velocity from ejection. They would also be slightly spun up by tidal interactions. Incidentally, the laser-measured tidal recession of our own moon closely matches the expansion of space time estimated on much larger scales (it's in the same ballpark, anyway). With the never-ending, massive failures of big bang, alternatives are in play.

@PrateekVarshney_PV 3 года назад

Diana's version of "you spin me round" 😛 and spinning 🐄 s

@allcolours3213 3 года назад

This video is Way more better than a class lecture

@DiegoBello 3 года назад

I wish they had these kind of videos explaining physics back in 1998...

@kampfkeks6619 3 года назад

Dianna you should really watch (or read) the expanse if you want to see what the future could look like! They have a spaceship that imitates 0.3 earths gravity by spinning a big drum in the middle and every spaceship does a "flip and burn" to get some resemblance of gravity! It's awesome

@megamanx466 3 года назад

Or also the 'Gundam' anime series has had those for around 40-50 years. The video game 'Halo' too uses a giant spinning ring with a habitat within. :)

@nitinpandey5753 3 года назад

I didn't heard about Vera Rubin's conclusion before , wow new things I have learnt today ✌️ thankyou🤗

@BothHands1 3 года назад

love this vid sooo much. did calc 2 and dif-eq back many years ago, but since my masters is neuroscience, i've forgotten a lot of it by now. love the refresher course

@FroehligGirlz 3 года назад

".... boundary conditions. I'll call this the Extreme Behavior Method of Sanity Checks." I think I've always felt physics and psych have parallels. Centriptetal vs. Cetrifugal (aka objectivity), behavioral inertia, gravity, calculating forces... this one's a gold mine!

@bomba1367 3 года назад

Thank you for this..My husband is one of these guys...I remember when this was a new trick ..and now I can share your video with our 13 year old youngest daughter for homeschool! So fun to find this!

@bomba1367 3 года назад

In case you wanted to know his name is Bucky Lasek

@bomba1367 3 года назад

@expired tofu that’s silly ...

@bomba1367 3 года назад

@expired tofu yes for years

@bomba1367 3 года назад

@expired tofu ahh thank you.. enjoy your day🌸

@NewMessage 3 года назад

All that math has my head spinning, for sure.

@astrophiledevansh898 3 года назад

Ohhhhhhhhh circular motion.

@harpstone 3 года назад

Indeed - may centripetal force always be with us.

@lordmaximillius3431 2 года назад

I love Physics and Veritasium and now Physics girl

@Troll-by6kz 3 года назад

I'm currently studying in High school and this is so helpful, I've been watching your videos for a very long time

@buttersalsa4947 3 года назад

Love these vid! They are helping me with my senior ap physics c class so much! Especially with school being online this year I need all the help I can get, keep it up!

@hrithikgeorge4571 3 года назад

20:38 That was so satisfying!

@harshbamane17 3 года назад

Even my native language is not english i got max. Of the teaching which i dont understand from my native teachers.Loved so much . Love from India❤️. Thx mam.

@aveekdas4948 3 года назад

I really enjoy and learn much from your explanation Please never stop making such awesome videos. Physics is all so exciting when we have teachers like you.

@sarthakmalhotra7413 3 года назад

When the x^ looks like a wizard's hat. Me: "did you save the playlist?", Dumbledore asked calmly...

@milansood8240 3 года назад

hi diana today my techer used your 4 year ago video to teach bernoulli principle i was very happy that i already know you

@johnchessant3012 3 года назад

Nice message from Veritasium at the end!

@ivandeleon8969 3 года назад

YOOOO IM A POI SPINNER AND IVE BEEN WAITING FOR THIS EPISODE!

@TheSdfswf 3 года назад

I do it the same way - the textbook way, but I enjoyed learning the 'new' way. Just depends on which force you choose to resolve.

@harshbandodkar5833 3 года назад

Mam please cover entire mechanics,thermodynamics,shm,waves, electricity and magnetism and modern physics. This is the syllabus for jee mains and only you can make it very easy 😊. Love from India 💙💙💙

@mehulsahu6114 2 года назад

Thanks for such content and ending sir veritasium said awesome lovo from India

@stowphysics 3 года назад

@7:34 A CORRECTION IS NEEDED. YOU do not feel the centrifugal force when you are in the spinning ride. YOU feel the centripetal force of the wall pushing you toward the center, which is the ACTION FORCE. The wall of the ride feels the centrifugal force from you, which is the REACTION force. I'm willing to throw down over it. Come at me bro!!!! Seriously though, she did state that incorrectly.

@javierramirez6467 3 года назад

Dianna you are the best, I love all of your videos they're very productive! Thank you for making this amazing work! I love it!!!💚 🌎🇲🇽

@utkarshsrivastav6693 3 года назад

Always eagerly waiting for her remarkable shows, full of knowledge & curiosity... Please do one more thing- Do upload subtitles from your end for these presentations, bcz most of the young population (who need it most) of Non-western countries are unable to get this precious information bcz of fear of not understanding spoken English very well..

@mjayaprakash2807 3 года назад

I love the way of teaching the science with practical way

@timthompson7205 2 года назад

It’s funny, whenever I think about you Dianna, I’m thinking about a very specific circular motion.

@AhmedMAdly 3 года назад

i took centripetal forces last year and i just understood it now :"D please keep making these videos they help me a lot! ^_^

@Ed-quadF 3 года назад

Thanks Di and all the rest that made this video possible. Love it.

@RobertSmith-pw9io 3 года назад

Professor you are amazing! And a little spooky, you always post a video on the exact issue I am struggling with. You do a terrific job at explaining it so I can understand it better, but I'll have to remember not to drink coffee before watching-because you inject enough energy into the experience that it takes hours for my brain to slow down. Thank you very much!!

@megamanx466 3 года назад

Caffeine has been shown to help with memory retention though. :P

@dankennedy4364 3 года назад

Ms. Dianna makes these fun!

@TechnoMageB5 3 года назад

Have you ever considered writing a basic physics book? With references to your RU-vid videos? You have a talent for presenting things in a way that make sense.

@SunriseFireberry 3 года назад

May the force be with you

@abrahamwondafrash7549 3 года назад

it is so nice to have you as a teacher Diana❤️❤️❤️

@wedgie502 3 года назад

im 48 years old and just want to know how stuff works, lol. awesome new videos Dianna!! keep 'em coming!!

@karthiagency2865 3 года назад

YOU ARE A BOON TO THE 21ST CENTURY LEARNERS .......#LOVE FROM INDIA

@iampuzzleman282 3 года назад

I get loopy trying to digest physic lessons. Dianna makes it easier and fun!

@amrhamed9553 3 года назад

AWESOMENESS IS THE WORD THAT IS INCREDIBLY SMALL FROM WHAT YOU REALLY DO, AND YOUR GENEROUS TEAM. THANKS FOR YOUR OUTSTANDING CONTENT, VIRTUAL HIGH 5 ✋✋👍👍

@AmeenTopa 3 года назад

13:40 "If you get this wrong, I've failed" Maybe it was a joke. But yes that's the attitude of a good teacher. I met many teachers blaming their students all the time if they failed subjects and never looked or considered if their way is teaching is the problem!!!

@naveenraj2008eee 3 года назад

Another cool lesson learned.. Thanks Diana.. Awaiting for more..

@yuiho3378 3 года назад

The radius of the round corner is needed in Problem 3 in order to calculate the answer. But it will be a bit of work for AP or IB. Thanks anyway. Good lesson.

@neenaparikh5252 3 года назад

is there anyway you could make these faster lol theyre so helpful! im a freshman in college right now and these are saving my physics grade so much... but were a little bit ahead of where your last video is!! i swear i would pay to have access to your future videos earlier to help me in this class!!

@davekendall4698 3 года назад

Can you imagine meeting her in a pub and asking what she does for a living 😕 or telling her- you had seen a rainbow on the way 🌈 . great video fascinating. 🐄

@soltcolt4506 3 года назад

These videos are very useful for everyone, please keep up the good work.

@cupid111aby 3 года назад

Dianna sissy, you the best. U had helped me in many situations. Thank you for this too. Love you dear sis, take care ❤️❤️❤️

@silverstream3531 3 года назад

I just finished learning about the centripetal force, this really helped!

@cccircuit8296 3 года назад

You've gotten really good at making these, thank you!

@johnarcayan8088 3 года назад

This channel is amazing!

@theobolt250 3 года назад

And you weren't spinning RIGHT round! You went LEFT! 😂😂😂😂

@cometmace 3 года назад

One of the things that turned me off of physics in high school were all the formulae for force. Chap 1, Pg 1, "What is Force". "Force is mass times acceleration." F=ma. But then F=(mv^2)/r, F= -kx, F=(Gm1m2)/r^2, ... Every time I turned around, there was a new formula for F. I have since reconciled myself to what's going on, (Thank you Prof. Goodstein and the Mechanical Universe) but perhaps you can make a video of why there are so many.

@ZRO777 3 года назад

Came for the cuteness stayed for the physics

@progressor4ward85 3 года назад

the graviton is tethered to the center by the floor and ceiling therefore the force is in fact centripetal

@CM-js5bh 3 года назад

Now I have a headache... but is good because I made my brain to comprehend it... more of these please!

@europaeuropa3673 3 года назад

Hello Physics Girl Dianna. Like your vids however, I have a question for you and I realize I am changing gears on you: Compare Mars and Earth: Average Global Temp of Mars is -87F. 95% CO2 in Mars atmosphere and 1% Water Vapor. Average Global Temp of Earth is 59F. .04% CO2 in Earth's atmosphere and 4% Water Vapor. Mars atmosphere is about 1% that of Earth. Mars gets about 60% of the solar heat flux compared to Earth in watts/meter squared. The CO2 concentration is about 2,400 times that of Earth, while water vapor is 0.25 times that of Earth. Earth's atmospheric pressure is about 167 times that of Mars. Normalizing CO2 and Water Vapor in the Mars atmosphere using the pressure factor gives for CO2: 2,400 / 167 =14.3 and for Water Vapor: 25 / 167 =.0015 Taking the 60% factor for the solar radiant heat flux gives: 8.6 for CO2 and .009 for Water Vapor. If my assumptions are are not too far fetched, the relative heat trapping effectiveness for Mars' when directly compared to Earth shows that Mars has 8.6 times the CO2 heat trapping ability of Earth, but only .0015 times the Water Vapor heat trapping ability. The conclusion drawn is that CO2 is insignificant for trapping atmospheric heat radiated from the surface. However, Water Vapor is extremely important for trapping atmospheric heat radiated from the surface. BTW, if CO2 is so important why am I heating for 9 months for the last 2 years whereas 10 years ago I only had to heat for 7 months.

@ThoseMadFoxes4330 3 года назад

Hey, I might be wrong about this, but I think there’s an issue with the idea of using centripetal force to simulate gravity! Since centripetal force would require that everyone be contacting some portion of the spinning cylinder or at least be in contact with something that is; if someone were to accidentally stop contacting the ground, especially while moving opposite the direction the cylinder is spinning, wouldn’t their experience be that of hurtling through the air at 0G while the rest of the world moved past them experiencing their simulated gravity like normal? My reasoning is that unlike density driven gravity, in which things are pulled by a current of space-time (they’re connected to space-time like a swimmer to water, and the water is being pulled on); centripetal gravity seems to be escapable by simply disconnecting from the cylinder at an angle and velocity that counteract the tendency to travel tangent to the curve (which would have you landing on the floor again as if in density driven gravity) Let me know what you think! By the way, I LOVE YOUR SHOW!!!! I’m learning so much!! Thank you!

@PhyPsyFilm 3 года назад

0:26 I thought it was Dianna herself attempting the loop of death lol

@towakosano5796 3 года назад

Lol same 😂

@ravinayadav8247 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fvGNI52gkBE.html

@desigeekchishi 3 года назад

that look at @1:40 ;) Amazing video n the application of circular motion :)

@anubhavrana621 3 года назад

Great explanation Dianna as usual. Best wishes, always.

@ragibishrak6705 3 года назад

Uhhh.It was damn good.Thank you for clearing my doubts.Honestly, speaking this is the way physics should be taught.Even your smiling face gives me more confident than my teachers lecture.☺

@temidayofalomo991 3 года назад

Literally, my crush 😻 Thanks to you and the team for this❤️❤️

@oofmantan 3 года назад

Your one of the coolest people I have ever watched

@oofmantan 3 года назад

Your Unique

@jovan.samuel 3 года назад

I'm in 10th grade and it is helping me very much tho. Very grateful. And same with materials that I learn at school.

@twothreebravo 3 года назад

Don't let anyone tell you different. You are beyond cool.

@biswaruproy5743 3 года назад

Hey Diana, I have a question: at 16:45 you've correctly written FnCos(theta) = Fg..............(i, say) isn't it also true that FgCos(theta)= Fn ........ (ii) ?? then , equating (i) and (ii) we would get a weird equation: FgCos^2(theta)= Fg, or, (theta)=0 WHICH IS WEIRD!! Then how can you explain theta always being zero in this scenario....PLEASE Do reply. You're doing a great job. Keep up the good work👌👍

@davidcampos1463 3 года назад

There's a chance that if you were to show every letter replaced by numbers, people would see how valuable letters are. A solid letter for a constant and a non-solid (outline) letter for a variable may also help.

@davidcampos1463 3 года назад

According to Derek of veritasium this will not work. I guess, there must be a point of departure from arithmetic to physics. I don't have this.