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

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

[eccentricOrange]

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

[pekame]

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

[timeverse]

Queen of physics - YouTube’s physics girl

[flyingark]

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.

[happyhome]

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

[uchesamuel]

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

[JB]

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

[BillBodrero]

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.

[mattwhiting]

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.)

[math_the_why_behind]

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

[crazybrit-nasafan]

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

[Saraseeksthompson]

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

[johnchessant]

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.

[hotflashfoto]

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.

[bonchonjonjon]

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.

[papaowl]

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

[bhargaviprajapatii]

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

[mehulsahu]

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

[turpialito]

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

[Sohamsta]

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