Free Body Diagrams - Physics 101 / AP Physics 1 Review with Dianna Cowern

Рет қаралды 127,161

Күн бұрын

Lesson 5 (Free Body Diagrams) 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: Draw a free body diagram (FBD) for a bottle of nail polish falling straight down. Draw a FBD for a soccer ball kicked at at an angle, after the kick. What about during the kick?
Problem 2: You are standing on a scale in an elevator that is accelerating upwards at a rate of 2.0 m/s². If your mass is 58kg, what does the scale read in Newtons? What would it read if you were decelerating at 2.0m/s² (accelerating at -2.0 m/s²)
Problem 3: We built a human-sized Atwood machine using two masses: 65kg and 79kg. The masses fell 2.0 meters from rest and it took 2.2 seconds. What do we get for “g”? What are some possible sources of error?
Problem 4: You build an Atwood Machine where the masses have a ration of 4:5. What will the acceleration of the masses be?
Special thank you to the amazing Bill Nye for his shoutout at the end of the video!
Credits
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Spenser Reich - Video Editor
Sophia Chen - Researcher/Writer
Erika K. Carlson - Researcher/Writer
Hope Butner - Production Assistant
Levi Butner - Videographer
Kyle Kitzmiller - Consultant
Andy Brown - Curriculum Consultant
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

Пікірлер: 427

@sebastianelytron8450 3 жыл бұрын

Imagine having a physics teacher like Dianna growing up. We'd all be physicists.

@orozcocris93 3 жыл бұрын

I feel like she is my age. She is more like the nerdy girl I would've had a crush on lol

@FlyingSavannahs 3 жыл бұрын

Yeah, my classmates and I in graduate school (mid '80s) would say if we'd wanted to meet women, we'd have joined the Army.

@orozcocris93 3 жыл бұрын

@@FlyingSavannahs still true today my friend lol

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble

@joeybobbie1 Жыл бұрын

It would have been hard to Concentrate if She was my Teacher.😁

@ElectroBOOM 3 жыл бұрын

Yay Electromagnetic Force! Now back to gravity...

@themarvellouschannel3032 3 жыл бұрын

Hi Mehdi

@blackjack3257 3 жыл бұрын

yay to the gravity, i won noble for my research on 'gravity defying p**ing', i proved if someone raises his thing by hand he can vector stream at longer distances.

@ambilyjibu8782 3 жыл бұрын

Yay King is here

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble

@-InnocentGirl 3 жыл бұрын

ElectroBOOM Meow meow You r one of my favorite teacher of all time 👊🏻

@pvic6959 3 жыл бұрын

whooo i am ready to learn! You are the best physics teacher by far! even though I am out of high school (and college for that matter), I still watch these for fun. I took AP physics (when it was called physics honors in 2013) and it was really good. I have watched your videos since then and I know this series would have helped me as well as many others back then. I am really glad to have a resource like this now that i can share

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble.

@elmo2you 3 жыл бұрын

@20:23 "here's a map NASA made of anomalies around the planet." That's the gravity map for Mars, not Earth (as the context implied, by giving the range of gravity on Earth in the preceding sentence). Not trying to be pedantic. My first thought was: "what are those huge white peaks .. they make no sense". Then an image search taught me it was the Mars map (where those peaks do make sense).

@riaanerickajonker 3 жыл бұрын

Yea, those white peaks threw me for a loop too. Just didn't look right. Luckily this is a physics channel and not inter-planetary geography channel.

@msudawg1997 3 жыл бұрын

Good catch. Your comment made me pause and stare at the map for a bit. You can clearly see lots of craters that I wouldn't expect to see on earth either.

@TimBowers 3 жыл бұрын

Oooo didn't catch that. www.smithsonianmag.com/science-nature/a-map-of-earths-gravity-30976030/ Here's one of the earth too, for those wondering :)

@rafasliwinski5399 3 жыл бұрын

I noticed them too. That map looked weird for Earth. But than I noticed Valles Marineris, that canyon a little bit to the right.

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble.

@ryankozak99 3 жыл бұрын

So glad Dianna explained the "Gravitational Field Trip" joke - totally missed it. TIP: Use the slow-motion video function on your phone (while recording event and a stopwatch) to accurately measure time from point to point. This error is likely far greater than the error due to neglecting the rope and pulleys.

@merdufer 3 жыл бұрын

I came in here looking to get a body diagram for free, but this is cool, too.

@tree_carcass_mangler 3 жыл бұрын

Yep.

@Belowtheroots 3 жыл бұрын

Lol

@glarynth 3 жыл бұрын

I think the stick figures qualify.

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble

@krishnasharma8674 3 жыл бұрын

same here

@sagnarte6074 3 жыл бұрын

I can't tell you how much these videos have helped! I am not a big fan of how my school teaches physics, but these videos really help me understand the concepts! FBDs make more sense, and they are amazing!

@ricksanchez9232 2 жыл бұрын

Physics has always been my favorite subject and you sure make it fun. Find myself going through your lectures and would recommend them to any young physics student.

@QuestionEverythingButWHY 3 жыл бұрын

"I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer." ― Stephen Hawking

@siddhantjadhav83 3 жыл бұрын

You comment on every dhruv rathee's video!! how come you are every where?

@ScottKentEdu 3 жыл бұрын

Imagine if we all did this.

@angelalewis3645 Жыл бұрын

So cool!

@smartestworks1232 3 жыл бұрын

I just love these explanations It is much simpler and more concept clearing just love it!!!!!!

@abhiroopreddy1948 3 жыл бұрын

Really helpful, Please keep making content like this!! Really looking forward for more!!

@cliff8459 3 жыл бұрын

I am from a country called sri lanka,in 15 more days I have to face an exam similar to AP physics,so thanks for these videos!!!!

@cliff8459 3 жыл бұрын

@Yash Paul Sharma thanks

@dioptre 3 жыл бұрын

good luck bro

@abraneveah5677 3 жыл бұрын

Good luck on your exams!

@marmundo9110 3 жыл бұрын

I watch your Physics 101 videos to take a break from my engineering classes. Thank you!

@skitzxplods 3 жыл бұрын

I still have literally no idea how any of it works but I really enjoy trying to understand it, thank you Dianna for another great lesson 😊

@MrWayneStephen 3 жыл бұрын

I missed a few videos so probably late BUT OMG THAT BACKGROUND IS AMAZING!!

@samedwards6683 5 ай бұрын

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

@joecanales9631 3 жыл бұрын

Nice course. Took my physics many years ago. On our gravity field trip to measure gravity across a salt dome, all students got to take a reading on the gravimeter. On my turn, I couldn't get it to center. Whenever I got close, it would fall off one way, then the other. I finally told the prof I was having problems. He had me try some more, with no better results, so he finally tried himself. After a few tries he stood up and looked around and pointed to a freight train off a few miles away. He said the train was setting up waves which was causing enough elevation changes to move the needle. He got me to center it the best I could so that it was going from one side to the other fairly evenly and took that as our reading. Next class involved punch cards to run models for our measurements for depth and size.

@Starkahad 3 жыл бұрын

Was this for college?. Because you just made a gravmetric survey look like a very fun high school trip

@joecanales9631 3 жыл бұрын

Lalo Tapia it was in college in a geophysical field trip.

@animeshpanda417 3 жыл бұрын

Due to this channel I got 50 / 50 in a physics test in my school. HATS OFF TO DIANNA. ❤ 👌👌👌👌👌👌👌👌👌👌👌👌 & the 69th like is by my 😐

@evelynbrylow3624 3 жыл бұрын

ANIMESH PANDA I’m using this to maybe get a little better on my test in 20 min 😂

@animeshpanda417 3 жыл бұрын

@@evelynbrylow3624 😂😂 👍👍

@joeybobbie1 Жыл бұрын

Hi Physics Girl, You are absolutely Amazing, and a Great Teacher. The way you explain things sure makes it easier for us Non Physicists to understand. Plus your a Lot of Fun. I Love your outlook and enthusiasm for Science. Thank you for these Great Videos from Texas.👍👍❤️

@prabhreetxd8157 3 жыл бұрын

Your classes are awesome. I loved them and also helps to refresh concepts and i loved to learn many other new concepts. The way you teach is awsome. Intersted in quantam physics and want you do do a ap phy class

@scottsanerd752 3 жыл бұрын

what always found interesting about this is if you decide to pull m1 and m2 out and set them as a ratio, m1/m2 = (a+g)/(-a+g) you can set acceleration to anything as long as acceleration doesn't equal gravity. (this would force us to divide by 0) and this makes sense because if you have 2 masses hanging on either side of a pulley the falling one can never reach an acceleration of g. I was teaching this, this week and had never realized this before.

@davewilson13 3 жыл бұрын

Love the new channel focus!

@jkbrown5496 3 жыл бұрын

Most useful thing I ever learned. Work those problems till its second nature and you won't regret it.

@tdb2012 3 жыл бұрын

Brings back memories, not all enjoyable. Lol. Love your quirky sense of humor. 😁

@harshhari8226 3 жыл бұрын

I m so fascinated by you....and acquire more and more knowledge I can..from your videos..really love it🤩🥰🥰

@iampuzzleman282 3 жыл бұрын

I only wake up to your lectures. I have reconfigered my alarm clock to your notifications and then resume my hibernation. It’s all an amazing dream.

@muhsterml5790 3 жыл бұрын

Very amazing, thank you Dianna

@sebinvarghese4909 3 жыл бұрын

I'd opt engineering if saw her before I took pre-med entrance ❤️😅

@beactivebehappy9894 3 жыл бұрын

Were you giving NEET while doing photoshoot of your profile pic??

@sebinvarghese4909 3 жыл бұрын

@@beactivebehappy9894 😂😂🤭

@mr.knight8967 3 жыл бұрын

Math QUESTION Algebra question kzfaq.info/get/bejne/gdR4ZLlk0bzKgo0.html One time watchble.

@dangerousnigga7023 3 жыл бұрын

Why engineering and not physics

@HighLordSythen 3 жыл бұрын

Love your braids! Forcing myself to learn physics soon. I majored in mathematics and teach it, but I've always been interested in pure, non-applied mathematics. My friend is a physics PhD student. I'm hoping my students will finally allow conversation in that realm, at least at a more elementary level.

@Sarthak.2406 3 жыл бұрын

I truly love u and ur videos 📹

@pxix7rathamesh 3 жыл бұрын

The thing which i like the most is your explanation and your great smile 😉😉

@sanjuansteve 3 жыл бұрын

This video swole my physics knowledge. TY Dianna!! :D And I love Bill Nye too!

@hertz_4174 3 жыл бұрын

Excellent video.

@itsdeonlol 3 жыл бұрын

Very awesome Diana!

@abdelhamidahbane6322 2 жыл бұрын

amazing lesson !

@antonettemarietomarong6921 3 жыл бұрын

Our Physics Professor always gave us a zero mark if we don't draw free body diagram in our solution. 😥 This video help me a lot especially now that midterms is near. 💜

@arashphs 3 жыл бұрын

I've been watching your videos for a long time now. I have a Physics degree as well and when I think about the way I was thought these concepts and the way you teach them here, I feel like I need to go back to school and learn everything again from scratch, but this time with your methods. Your enthusiasm in teaching is so inspirational! Thank you for awesome videos!

@ligh7foo7 3 жыл бұрын

Hi Diana, thanks for your videos, I passed my first (very basic) chemistry assignment, I left a few questions on other videos, don't know if you saw them :). on to the physics

@KoalaMeatPie 3 жыл бұрын

3:23 HOLO TACO!!! shout out @simplynailogical

@kh628 3 жыл бұрын

Glad I'm not the only one who noticed that!

@Shihab1979 3 жыл бұрын

Thank you so much.✨

@clydecessna737 3 жыл бұрын

Wow! Reading the credits makes me realize that it took a lot of people to make this video. Food for thought.

@mandycole21 3 жыл бұрын

"G"..... I love this channel I learn so much

@charles_wipman 3 жыл бұрын

I find all this quite complex, but i understand it better well explained as you do; thanks.

@suzannestrickland1586 3 жыл бұрын

I love that you fan-girled about Bill Nye. I watched him a lot when I was younger. I can see it now: Did you enjoy watching Bill Nye the Science Guy? Well then you are gonna love Dianna Cowern, Physics Girl! I mean, I'd watch that show.

@xdragon2k 3 жыл бұрын

I can't get over how good your handwriting is.

@voicelessnote 3 жыл бұрын

love your videos...

@herambpatilofficial 3 жыл бұрын

Amazing!!!

@arsonor 3 жыл бұрын

I’m curious why you don’t call the scale’s force on the person “normal force”. Still works just fine for the FBD. And for clarity, I teach my students that “scales measure normal force, not weight”. Weight doesn’t change in an elevator, but the normal force does. Thanks for another great video!

@ericsimonson3128 3 жыл бұрын

I teach this too. Normal force for sure. Fg does not change.

@FenceOnAWall 3 жыл бұрын

Another great one in the bag

@vaguelyfamiliarguy3853 3 жыл бұрын

As a third-year undergraduate physics student, I have no need to watch these videos, but I do because they're just that great. Always need to work on fundamentals too :) Just a tip: Label your axes. It will really help on clarifying what's supposed to be negative and not.

@SynthRockViking 3 жыл бұрын

Thank you for the free body diagrams :)

@ashgoku6966 3 жыл бұрын

Man I used to feel so good solving problems related to free body diagram . Physics is my favourite subject

@neiljudell1437 3 жыл бұрын

Just noticed this post. Really wish you had published this back in '72 when I was getting my start in physics. Profs made us pay for all our diagrams - they were absolutely not free.

@russelldofrane6614 3 жыл бұрын

I feel more smart now. Thanks Physics Girl!

@cameronbrown7231 3 жыл бұрын

Must be so humbling to have Bill Nye in one of your videos! Thank you so much for uploading these lessons!

@Pampersnoot 3 жыл бұрын

I got the relationship between Newtons and kilogram force messed up in my head for a minute and thought that Dianna told us she weighed half a ton. Which did not sound right at all. I also learned that it would take ~8.42 seconds for the elevator on the Taipei 101 to reach its maximum velocity upwards assuming a constant acceleration of 2m/s/s from rest.

@math_the_why_behind 3 жыл бұрын

I love the cows :) May you please tell me where you got them? Thanks! :)

@carlosee88 3 жыл бұрын

Her handwriting is amazing!

@moldywaffles101 3 жыл бұрын

Our Physics teacher in HS was boring when she taught this..fell asleep a couple of times..this is clearer..

@angelalewis3645 Жыл бұрын

Really good lesson

@ScrybeSG 3 жыл бұрын

I sort of noticed that you were almost "singing" some of the equations...and then I noticed that with many of the variables "rhyming" that singing them really worked. 😁 I wonder if anyone puts out "mathematical music" now. 🎶 But, great lesson as always. I keep reposting them, largely hoping that my nieces that are being homeschooled will get to see them. 🖖☺️

@marmundo9110 3 жыл бұрын

SPENSER REICH you are a genius! Awesome video editing! Those cow sound effects... man! I almost died laughing 😹🐄

@miguelJsesma 3 жыл бұрын

I didn´t know about this way of measuring G, iTs fantastic!. I read about Galileo using inclined planes to slow down the `fall` od some balls.

@bjd1980 3 жыл бұрын

I love your enthusiasm (I was going to say energy, but couldn’t bring myself to :-) I’m a science educator and am super intrigued by your human Atwood machine. Is it feasible for someone with minimal funds and little construction knowledge to build one? Me. I’m talking about me. Thanks again!!!

@yen7roc 3 жыл бұрын

I LOVE PHYSICS!!!!!!! ITS MY FAVORITE THING!!!

@MatthewBishop64 3 жыл бұрын

Best physics teacher ever

@Hardrock1a 3 жыл бұрын

On a ship at sea, if you are in heavy seas, going up and down ladders is an experience. If you're headed up the ladder and the ship is riding up a wave, you feel REALLY heavy; but if the ship is riding down the wave, you feel light and can climb the ladder in a flash. (Ladder is a naval term for stairs, but the ladders on a ship are steep, like a ladder against your house.)

@MuhammadDaudkhanTV100 3 жыл бұрын

Cool working and good luck

@glennmatsiwe8705 2 жыл бұрын

Hi Dianna i really enjoying this course. i would like to place a course suggestion on Quantum physics.

@chubbyface74 3 жыл бұрын

Hi have u considered using super slow motion to find g? Many smartphones have this function. Put a high stopwatch and drop a very small heavy mass over a height of 2 to 3m. Find the time using super slow motion. Managed to do it with my students.

@vikassrivastava2680 3 жыл бұрын

@14:55 - You should have mentioned the tension point first, that the tension across the rope is same (because rope is not compressed or stretched and friction from pulley is negligible) and as a result of the tension being the same, the accelerations of the two weights are the same. Cause and effect.

@MatthewBishop64 3 жыл бұрын

Dianna: We're gonna neglect the mass of the rope. Rope: :(

@deleted7446 2 жыл бұрын

:))

@Roy_Godiksen 3 жыл бұрын

QUESTION: Do light and sound add resistance to moving objects?

@georgetrapp6666 3 жыл бұрын

1:06 Most jokes aren't funny, if you have to explain them, but that one got me laughing.

@faisaleqbal5367 3 жыл бұрын

justt love ittt

@michaelggriffiths 3 жыл бұрын

What if gravity actually is the *strongest* force of all (or at least stronger than the other 3 we are able to perceive) but it's influence is attenuated through manifold dimensions?

@gegejunpyo6947 3 жыл бұрын

Please do a video on sound waves

@kVidStream 3 жыл бұрын

I'm here for Diana :)

@embeddedsystemsguy 3 жыл бұрын

Electroboom got me here. Not disappointed, very good content!

@msudawg1997 3 жыл бұрын

Rotational inertia of pullies also affects this demonstration. The ones on your contraption look pretty small and lightweight though so doubt that has much of an effect here.

@nimaalonso Жыл бұрын

Hey physics girl. How did you measure the masses? The way a scale measures weight makes your calculation circular. I suggest a simple improvement. If instead of measuring the masses, you measure the ratio of the masses using a lever ( a seesaw with unequal arms) you can get rid of the absolute values of the masses.

@itsreeah2663 3 жыл бұрын

Science is awesome!

@wheretf 3 жыл бұрын

When did you find interest in 11th and 12th grade physics btw will you try JEE MAINS questions please try to solve pleasssseee

@shamilamohammad1189 3 жыл бұрын

Haha! Indian education system is so advanced u know. These are the topics which they're taught in their college🙈

@wheretf 3 жыл бұрын

@@shamilamohammad1189 ya but she have good concept so she might find it quite interesting 😏 I guess so. I hope she will.🙂

@himanshurai2014 3 жыл бұрын

@@shamilamohammad1189 despite of that india cannot produce single Nobel winning scientist in recent years and even some great engineering minds

@shamilamohammad1189 3 жыл бұрын

@@himanshurai2014 ya sad reality! Our generation wants to go abroad and work for them :(

@starkindustries4310 3 жыл бұрын

@@shamilamohammad1189 they why don't u do it then lol. If it was so advanced then IIT would have been top institutions in world it come near 200-300 lol

@PiyushYadav-wf5xb 3 жыл бұрын

Hey...please tell me why we taken it's velocity constant while falling down...?? Please

@jacobchouest4216 3 жыл бұрын

Will you be doing work and energy and thermal physics soon thats what my next test is on?

@avinashp8125 3 жыл бұрын

Diana, how do you research for new trending topics? How do you research and learn about latest things happening in science? Have a great day Diana and I am huge fan of your videos. Stay safe Diana

@tree_carcass_mangler 3 жыл бұрын

Who else thought there would be an offer for diagrams of bodies (like medical posters) that we could hang on our walls? I couldn't wait to hear what the tie-in to Physics 101 would be. Was it just me?

@manimaadithottam 3 жыл бұрын

I've a doubt. I often get puzzled by how big g (G) - gravitational constant was discovered. Can you clarify it.

@xxtripl3thr33xx 3 жыл бұрын

Maybe a video on free body diagrams explaining why going faster for big vertical drops helps with the impact of landing in extreme sports and why landing ramps also help. Could address why no one should've ever tried the infamous "Leap of Faith" (18'8" drop) by comparing Jamie Thomas' initial velocity to that of when Aaron "Jaws" Homoki landed the Lyon 25 stair(14'9" drop) would be interesting. Warning the Jamie Thomas Leap of Faith video is graphic and other attempts are worse.

@himanshuchauhan940 3 жыл бұрын

Nice pony diana looking cute and adorable as child . Great lessons by you lots of learning in this channel

@megamanx466 3 жыл бұрын

Whew! Half of this video sounded like work! 😆 (Work = Force × Distance) 😋

@garrettsmith9788 3 жыл бұрын

I remember having just learned about FBDs and watching “The Six Million Dollar Man” with some of my class mates. The FBD analysis tended to always show that he could not tear the top off of the tank because Lee Majors would just tip over because of unbalanced forces. We would then laugh uncontrollably. No one likes to watch TV with a bunch of engineers.

@kartikpaliwal1936 3 жыл бұрын

Hi Diana I really love your vedio I am from india and in the 10th grade and I really love your vedios can you make vedios related to the grade also pleaeee

@deancasper1242 3 жыл бұрын

17:03 "and we'll just combine them somehow...erm...😶" we've all been there ^>^

@TS_Mind_Swept 2 жыл бұрын

The Atwood machine gave me a great idea for a launched free fall tower

@itskelvinn 3 жыл бұрын

Where was this when I was in high school?

@epicasteroid6873 3 жыл бұрын

At 4:50 What... A cow launched in projectile motion I imagined and LOL 😆😂🤣

@anshulgumudavalli1919 3 жыл бұрын

at 4:33 would there be a force normal, since I was learning forces at school I had that question

@gmsherry1953 3 жыл бұрын

Did I miss something? Did she explain what she did to the egg? We saw two clips from inside. Did we see the clip from outside? Did she simply drop it? It looked like it had some spin.