Simple Harmonic Motion - Physics 101 / AP Physics 1 Review with Dianna Cowern

Lesson 16 (Simple Harmonic Motion) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need a review of AP Physics concepts before the exam? This course is for you!

Exercises in this video:
1. A. Find the length of a pendulum that swings with a period of 4.0 seconds on Earth.
B. What would the period be on the Moon?

2. A. Your 1000 kg car is bouncing up and down on its four identical suspension springs with a period of 1 second. What is the spring constant of those springs?
B. What would the period be on the Moon?

Credits:
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Kaitlyn Today - 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

[PapaFlammy]

*_Everything's a Harmonic Oscillator if you're brave enough_*

[abhilashasharmasuman]

To study physics we must look at physics the way Physics Girl lovingly looks at the Foucalt Pendulum.

[Sarthak.]

One of the best youtuber to post such amazing videos on lesson important all over the world also for free 🌎 hats off to u dianna !!😀😍🤞👍👍 keep it up 🤙 👍

[serenadezz]

9:53 the way she said "there's an integral too" as if it's nothing 😂

[geraldsnodd]

I wish my school teacher taught us physics as well as you do.😕
You're a good teacher. 😃

[cindot]

How i wish you could have been my geometry teacher in high school! You're excellent at explanations! My teacher hated the question "why?"

[himstitute]

Hey Diana, I am from India and preparing for jee mains and advanced.I am in class11th and I was very happy when this 101series was introduced by you.these days whenever I want a killer visualisation of any topic in physics I just watch your video relevant to that topic which helps me a lot...👍🏻👍🏻👍🏻👍🏻

[AlphaCentauri]

1:30 uhh
1:35 huhhhh
1:48 hooffff
2:30 hppppff
Diana undergoing 'physic'-al hardwork for us! 😋

[chillsahoy]

The way you explained the mass and spring constant in the ecuation, in an intuitive way, is such a valuable mental exercise. Whenever you see an equation, it's helpful to take a moment and understand in some intuitive way why each value is where it is. Why is time in that equation? Why is something divided by mass? What does it mean for the radius to be squared? In many cases people can work out why these inputs are there, and if you ask them to try and explain how changing that value would affect the result, they'll frequently get it right, even if they can't explain why they're right.

[azy_creative]

Best foundational videos of physics on YouTube 🤯❤️👍🏻

[WouterVerbruggen]

Nice intro into the use of approximations in physics! Much to the despair of our mathematician friends, physics is absolutely riddled with approximations. And then we're not even talking about _applied_ physics hehe. Greetings from CERN's ATLAS magnet RnD!

[kevinreardon]

You can use pendulum based clocks in Space as its not really "zero" gravity, you just don't have a dominate gravitational force to use. We also haven't developed the mathematical model for such a clock <grin>.

[zektarius]

problem 1 solutions
A. 3.976m
B. 9.724s

[minhaak]

U are transferring ur curiosity, enthusiasm and energy with the viewers too. Curiously waiting for all your lessons

[anshraii]

mam your way of teaching is awesome, just mixture of fun, seriousness and also your voice is best

[digitheadRex]

Great job Dianna. You really know how to attack the subject in an engaging manner. You make absorbing the information fun.

One minor detail: Big Ben is the largest bell in the carillon. The clock is the Great Westminster Clock.

[MitzvosGolem]

Excellent, thank you.

Took this in physics 1980s a good refresh.

If I recall pendulums that swing North to South become figure eights do to rotation of Earth vs East West stay straight.
Dr Feynman had a lecture on this as well as Dr Julius Miller.

[Saraseeksthompson]

I really hope you do more of these series. This is so helpful for ppl who can't learn in traditional environments

[pratikshinde]

I subscribed this channel because you were sharing some information that I didn't knew. But from last couple of months you are just uploading videos containing information that I learned in Highschool itself.

[scootskute]

@23:46 this statement is partially true. There is no acceleration related to the simple harmonic motion, so for the purposes of demonstrating this principal the statement is absolutely correct. Still, there are two components that make up accelerating that we feel at the bottom of the swing. Because we feel them we should understand why we feel acceleration that is not directly from the simple harmonic motion we are discussing.

First, gravity is pulling us down while the rope/chain is holding us up. We feel this every time we are at rest, so it might be easy to miss. This accelerating causes the motion of the swing. Second, the centripitalal acceleration at the bottom of the swing is pulling is in the same direction as gravity, adding to the tension on the rope. The total accelerating is calculated by adding the two
mg + ( v^2 / ρ )
Mass times gravity plus velocity squared over rho, where rho is the radius of the swing or the length of the chain. The higher we swing the more of this we feel.