(2 of 2) Mechanics - Review of all Topics - AP Physics C

[@NonAme-hk4gm]

I just learned more in about 30 minutes than I did the entire year from my AP Physics class. Thank you so much

[@wisdomisawesome5934]

That’s kinda sad 😂

[@Daszuhorer]

Same

[@TehVoodoonomnomz]

I'm taking both the AP Bio and AP Physics exam on Monday. I'm also looking to major into Celestial Mechanics, so this exam has been something that's been stressing me all year, I would just like to thank you for this video and all the other ones that you've made. You are capable of explaining it all so clearly and directly. You sure helped me a lot and please don't stop making these videos so you can help all future Mechanics C students!

[@julias3048]

I took AP Physics Mechanics this year with no prior physics or calculus classes… It’s been tough but I appreciate resources like this especially as the exam nears!

[@tylernguyen9900]

Good luck you and me both tmrw

[@julias3048]

@@tylernguyen9900 You’ll do great! Calc didn’t go great for me today, but there is still time for redemption! The fact that we are taking the class is enough to be proud of :)

[@terrywhite8530]

I was supposed to be self studying this with no prior physics or calc knowledge, except I only started now😹. Oh well good luck guys!

[@julias3048]

@@terrywhite8530 It’s okay… I self-studied BC while in AB and crammed all the material into one night. The exam did not go well but I’m at least glad I tried to fit in the content instead of entirely giving up and just going in blind because I would have been in 1 or 2 territory. Study as much as you can and for physics, this channel is a godsend!!

[@arcabaran3905]

Good luck y'all! Here I am taking AP Physics C, having took honors Physics 2 years ago (which covers Phys 1 & 2), and have both Mech and E&M to take in a few hours 🥲

[@FlippingPhysics]

If you go to my flippingphysics website, you will see that I have all of my lectures from AP Physics C uploaded and there are plenty of examples. Good luck on the IB exam.

[@VladKov36]

lets get tomorrow's bread. thank you sir!!!

[@vetrivijay2002]

d/dx = Lets yeet this wheet

[@codyzumr4040]

"life is like a sandwich, whichever side you flip, the bread always comes first* - some smart kid hope U get a 4, good luck peeps!!!!!

[@lelouch1990itachi]

I'm so thankful you spent so much time working on this for everyone to see. I had the unfortunate outcome of having a very theory based teacher who didn't care much for the class. (Way too many days absent and movie days) so this really helps out for a general review, thanks a lot and please do more of these for more classes, like calculus. Anyways, thanks a lot and wish my class luck this monday!!

[@FlippingPhysics]

jeremy delgado Comments like yours always leave me with mixed emotions. I am very glad to have been able to help you learn physics, however, I am sad to learn that your teacher didn't provide you with the help you needed. :) & :(

[@silevern5524]

My AP exam is in 1 hour and 27 minutes

[@sidneyboakye4662]

How'd it go? College next year?

[@arpanbhattacharya1558]

SAME

[@boogerbrain424]

One year later, I read this comment at exactly 10:33 AM, and my exam is at 12:00... this is freaky

[@danielpark9467]

Sidney Boakye how did yours go? Mine is in 30 minutes. What college?

[@sidneyboakye4662]

Daniel Park I didn't take on this year. I'll do AP Physics 1 next year. I'm a Junior in High School.

[@FlippingPhysics]

There are 2 similar equations that differ only because they have different subscripts. Velocity (tangential) = Radius * Angular Velocity, this one is for tangential velocity and you could be talking about tangential velocity at different points on an object, so the radius could change. The other equation is Velocity (center of mass) = Radius (object) * Angular Velocity, this one is for the center of mass velocity of an object that is rolling without slipping. You are welcome for the videos.

[@YoshBruh]

2019 kids watching past 10:50 : You took everything from me 2020 kids: I dont even know who you are

[@ckalpmm4845]

Lol so true

[@edward7699]

What does this mean

[@YoshBruh]

@@edward7699I guess context was lost to time but due to the 2020 virus, all curriculum past that point was not tested on our AP exam since that’s when the virus started so we never learned it

[@katiegarwood8593]

Didn't think there was anyone who could talk faster than Hank Green in a science video lol. Great explanations though

[@VJTaverna]

Let's hear it for the online Physics test! Hopefully if you're reading this, you're not taking the test right now.

[@t.jab.3298]

VJiggles yessir lets get this bread

[@_del_5510]

1 more day, good luck!!

[@bobthebuilder9509]

VJiggles My brains just exploded trying to understand Keplar’s Law lol

[@willvejcik3911]

I think its just units 1-5 so gravity and stuff isn’t on it this year

[@eddev]

Good luck!

[@lt172]

I had to check whether my playback speed was in 2x

[@FlippingPhysics]

Was it?

[@lt172]

@@FlippingPhysics No lol. But great video!

[@Willem500]

@@FlippingPhysics was for me! Always listen to KZbin at 2x speed.

[@rachey5148]

I almost always watch these in 2x speed but literally couldn’t for this one haha

[@FlippingPhysics]

The cosine function is almost the same as the sine function. Cosine is simply shifted to the left by 90 degrees or pi/2 radians. cos x = sin (x + pi/2). So the only difference is the initial condition. You would use sine if the object in SHM starts at the equilibrium position (at velocity maximum). You would use cosine if the object starts at its amplitude (zero velocity). Good luck on the AP Test.

[@KillianDefaoite]

Love the enthusiasm you put into your videos! My exam is in 2 days and I really needed to review on the first half of the year. Thanks!

[@FlippingPhysics]

You are welcome! Don't miss my entire review page: www.flippingphysics.com/ap-physics-c-review.html

[@deetusyeletus]

what are we getting on this test??? ONE HUNDREEEDDD!!!!!!!

[@TheEpicGamer73]

My AP physics exam is tomorrow morning, thank you for this!

[@brenn7754]

Letsgo boyz, AP Physics C Speedrun, all cheats off.

[@ahmedashmaig]

@flippingphysics. At 11:09 you say that the maximum acceleration occurs at equilibrium in SHM. However, I think you meant to say that this is where maximum velocity occurs, as acceleration is equal to zero during equilibrium since there is no spring energy.

[@aniruddhvasishta8334]

You mean 17:07? What you say is true, and the subtitles are actually correct here -- they say maximum velocity.

[@MTDragon]

Both exams were hard, but your review of the topics helped. Can't thank you (or my physics teacher, b/c he introduced my class to you) enough.

[@hamoodslammer668]

Give me motivation for my exam

[@marvinshang5339]

Thank you for making this and part 1. The two videos have really helped me refresh my knowledge of Mechanics which I studied last semester.

[@AlphaFrost14]

Unfortunately, my school does not directly offer any AP physics classes. I'm going to be teaching myself Mechanics this year in order to take it. Thanks so much for the amazing overview!

[@FlippingPhysics]

Sorry to hear you are having such a hard time with physics. Kudos to you for searching out and finding more resources to help you learn. Don't give up; it's _totally_ worth it!

[@AlphaFrost14]

Flipping Physics Oh no, the material actually comes quite smoothly to me! Thanks anyhow!

[@flyhunny1234]

I'm a IB student taking higher level physics (the syllabus for IB physics and AP physics somewhat overlap) your videos are a great recap they are concise and to the point. Thank you for taking the time and effort to put these videos together. I would like to suggest however that you work through a couple of examples so that students can see the equations somewhat brought to life. Thank you again!

[@Coins31415]

Thank you for helping me on my quest to get a 5! Really helpful video!

[@FlippingPhysics]

Good luck!

[@Coins31415]

@@FlippingPhysics Thank you so much!

[@TehAtomicPotato]

last minute cramming for the ap test ftw

[@TheMathamax]

I have taken physics 3 times (AP physics once and college physics twice) and you just taught me more in 30 minutes than I learned over 4 semesters.

[@FlippingPhysics]

That makes me both happy and sad.

[@rachelks]

watched your videos while studying for the AP Physics test as a sophomore in high school. rewatching them to cram for my physics final as a sophomore in college!

[@FlippingPhysics]

That's awesome! Did you find my newer AP Physics C review videos located on this page: www.flippingphysics.com/ap-physics-c-review.html Best of luck on the final!

[@robspencer9272]

My students noticed maybe an error at 17:09 where you say (for SHM) that a_max occurs at the equilibrium position when we think you meant to say v_max. Thanks for all you do!!

[@FlippingPhysics]

Bummer!

[@zhaochengzhong8982]

Thank you for the video! It is very helpful. Also, just want to point out that for densities, I thought there may be a mistake for lambda since it should be mass over length. It is around 4:40

[@FlippingPhysics]

Yes, you are right. bummer.

[@iceflower7004]

drinking game: take a shot every time he says "please"

[@grierkubota2370]

I had no idea how little I knew about physics until now. I have more anxiety than when I started...ugh

[@dennish2238]

This is a fantastic, intelligent video. Thank you

[@FlippingPhysics]

+Dennis H you are welcome.

[@deekshak.7610]

Question, when you say we need to identify the axis of rotation of a lot of these such as for torque, do you mean to just mentally y make a note of the AOR or do we need to actually write it down for the test graders when doing an FRQ?

[@avig3460]

When you've been watching too much Game of Thrones and the logo of your physics review looks like the sigil for House Bolton

[@abdisoclean5076]

Avi G 😂😂 3 years later and I am watching this video after watching the latest game of thrones episode

[@calebjoyal5116]

8:50 I don't understand; what is "d" in this situation/equation?

[@FlippingPhysics]

Caleb Joyal Look carefully at the drawing and you will see the vertical dotted line that has a length "d".

[@calebjoyal5116]

I see it, but what is that dotted line? From what point to the center? Sorry if this sounds trivial but for some reason I'm not seeing it.

[@FlippingPhysics]

Caleb Joyal The dotted triangle has two sides that I have labelled. "r" is the hypotenuse and "d" is opposite the angle. Therefore the distance "d" is equal to "r" times the sine of theta. The point is the distance "d" doesn't change as the object moves to the right even though both "r" and theta do.

[@INSP_NITIN]

Nice quick revision of basic relations of mechanics

[@irfaanjamarussadiq5500]

At 3:56, you wrote lambda = m/lambda, but shouldn't is be lambda = m/l where l is the length?

[@FlippingPhysics]

Yes, you are correct. I say it correctly, however, I wrote it incorrectly on the board. I would suggest you use my newer and better AP Physics C review videos: www.flippingphysics.com/apc-momentum-impulse-review.html

[@FBIOPENUP69420]

Who else is about to take their exam today? :D

[@Me4352]

Yup

[@sparkyyoo8000]

ahh so nervous

[@yousefghanem5108]

I don't take AP physics and I don't understand what he's saying but hearing big words makes me feel smart lol.

[@camilamendes5902]

This is so nice either ! Different you !! But teaching is transparent enough to blow anyone's mind !!

[@misticace95]

My AP exam is in 40min... so time to watch the other 2 videos over E&M

[@laughbytes6933]

2 hours till exam.. good review

[@reemmustafa5196]

thank you , life saver !

[@FlippingPhysics]

You are welcome. Good luck on Monday.

[@imsleepy620]

learning all of ap phys c: m 30 minutes before the exam lets go

[@instagramfinder4121]

this video helped me to pass my Ap physics class

[@johantrejo_]

About to take this exam. Good luck to everyone taking it

[@FlippingPhysics]

Good luck!

[@jacobdonders8381]

I think there may be an error in Linear Mass density. Shouldn't L be in the denominator, not Lambda?

[@FlippingPhysics]

+Jacob Donders Nice catch. Linear mass density equals mass per unit length. I'll add an annotation.

[@gavinvergara380]

Jacob Donders Yes at 3:57 he wrote lambda = m/lambda

[@dk0r51]

06:48 Isn't the link between translation and rotational velocity that the tangential velocity = r(omega)? The center of mass velocity depends on one specific radius. Regardless, thanks for the videos.

[@pmsingal]

Please upload a brief review of Wave Motion also. You haven't covered it in this review.

[@jooyoungkim8710]

This video is flippin good!

[@TheBigFatVladimir]

I love you and your concision.

[@hycao4437]

Challenge: watch this at 2x speed

[@yoyogummy]

Thank you! This was so helpful.

[@mountedantman10]

Uh oh, I memorized Kepler's Third Law (because of Princeton Review). How do I unlearn it?

[@FlippingPhysics]

You don't have to "unlearn it". My point was more that it really won't help you out much on the AP test. There is plenty to memorize and I try to point out things that don't need to be memorized.

[@mountedantman10]

Thanks. It's just that I never learned how the Third Law was derived, and I feared that the fact would come back and bite me in the butt someday.

[@abproductions8066]

I think you incorrectly wrote the position function for simple harmonic motion near the end of the video. It should be Asin(wt+phi)

[@paulnguyen1304]

depending on phi / phase shift these two equations are the same! I generally use the equation with cosine because I like having the graph start at the place where the spring has the greatest amount of potential energy and is fully stretched, but I'm pretty sure you can use sin when you would like the graph to start at the equilibrium point, where kinetic energy is greatest and potential energy is zero.. hopefully I'm right (cause ap test is tomorrow lol) and this helps!

[@FlippingPhysics]

I agree with Paul.

[@amirmoayed7196]

17:09 the equilibrium point has zero acceleration

[@appa609]

... shouldn't that be an r^3 in the denominator for Newton's vector law of gravity?

[@appa609]

unless that vector r is supposed to be the unit vector

[@FlippingPhysics]

Bill Kong Direct quote from the video "Newton's universal law of gravitation. The force of gravity between any two objects is equal to negative big G, mass-1, mass-2 divided by r-squared, times the unit vector r." So yes, it is the unit vector r and yes it is r^2.

[@chrisbond673]

Exam in 56 minutes, thank you Flipping Physics

[@romeoashkar1435]

Amazing!! Thank you so much!!

[@FlippingPhysics]

You are welcome!!

[@TaylorSwifts1stfan]

Doesn't x(t)= A sin(wt+fi) for simple harmonic motion?

[@carultch]

It's phi, by the way. F is Latin, and PH is Greek. That is the general equation, where A and phi depend on the initial conditions. In the event that you start it at the equilibrium position and give it an initial velocity, phi would equal zero, and sine without any phase shift would model the simple harmonic motion. More often than not, you start it at rest, at an extended position from equilibrium, and cosine is a more apt choice of trig function to form your equation. Ultimately, the difference is the value of phi, and where within the function you define the motion to start for whether it is sine or cosine.

[@annabelleklinee]

My exam is in 1 hour and 14 minutes! I feel like I should know these things by now

[@nickmorin2945]

thank god this exists..

[@jastonyuh765]

AP exam in 15 minutes, watching this as I’m running late

[@tejasgupta1820]

At 17:09, you mean minimum acceleration.

[@samuelvasquez3407]

My Ap exam is in 22 hours, 34 minutes and 30 seconds! Thanks for your videos!

[@GoravSaluja]

Same! I'm hypee

[@FlippingPhysics]

You are welcome for the videos. I hope the exam went well for you both.

[@kpgohan]

Thanks for the video! Which student were you like lol

[@FlippingPhysics]

I am an amalgam of all of them.

[@ogginger]

Thank you soooooo much!

[@_aft]

Last minute cramming right now. AP exam in 2 hours lolol.

[@FlippingPhysics]

***** You clearly are not alone.

[@_aft]

Flipping Physics Of course haha.

[@_aft]

Great video, btw! I was really confused on the circular motion, but you really cleared up my mind on that!

[@Cavaliers9991]

Same haha

[@yoelsilverstein3909]

Amazing vids

[@ericpham2581]

Thanks for the video

[@FlippingPhysics]

You are welcome!

[@gorgeousredundantdaemon291]

Calling it, parallel axis theorem on 2019 exam.

[@jleidy105]

thank you!

[@miabirkelund7899]

me watching this 13 mins before the final set of retakes this yr like ...

[@burritoleche4081]

this made me shit my pants

[@swauce507]

anyone here for some last minute corona cram?

[@Rahat2056]

I'm here for some last-second corona cram

[@owenchayes]

KaptainKarma here for last millisecond cramming

[@Rahat2056]

@@owenchayes U are truly a god amongst men

[@sidneyma9939]

ayyyyy

[@ChristopherNemoNakamura]

Thanks

[@matthewgoodman2297]

lets GOOOOO

[@George-me3xv]

these r so clutch

[@quebtintelothy2870]

I am going to take the Exam in 2.5 hours, I will update this comment later Update: I’m just happy i remembered F=ma Ok so I got a 2

[@fled143]

Awesome

[@stephenhawking4611]

Just lemme lock in rq

[@cadenchase3112]

my taking a deuce watching this in my school 10 minutes before my exam

[@natalieadams6786]

all of these comments are from people trying to re learn everything they forgot in quarantine. me too lmao

[@ondrahalouzka8572]

lifesaver

[@FlippingPhysics]

you are welcome

[@BruhMoment-yf1ni]

AP exam in 9 minutes Watching on double speed

[@FlippingPhysics]

I hope it when well! 😬

[@IsaacKChoi]

Here 20 minutes before the exam

[@sav715]

anyone else taking ap bio & physics tomorrow? im ready to suffer

[@bogbert7019]

Great info! Just hard to keep up, you talk pretty fast

[@lucasresende6177]

"Or just... fishing thing" HAHAHAHHAHAHAHAHA I'M DEAD #BRAZIL

[@landoftheunknow]

got my exam in 1 hour and 37 minutes

[@FlippingPhysics]

Best of luck to you!

[@am24dog]

My AP test is in 26 mins yikes

[@pichass9337]

Character progression

[@McnuggetsTheSniper]

AP test in half an hour HEEEEELP

[@FlippingPhysics]

I'll send some good vibes. At this point, that is about all I can do for you. 😊

[@trollinragegamer3620]

Ap test for my final 😑😑😑

[@MoosePilot23]

AP Physics C exam in 2 days!!

[@FlippingPhysics]

Yes. Hopefully you noticed all of my review materials: flippingphysics.com/ap-physics-c-review.html

[@beartikal]

corona making things difficult

[@FlippingPhysics]

Agreed.

[@AnthonyZhu]

please

[@jackgrossman9542]

Two hours away

[@ashtond9627]

2020 'rona cram gang

[@shawn5809]

This is literally just going over the equations on the equation sheet...

[@hannahparent3702]

Shawn Stone ikrrr it’s not super helpful

[@FlippingPhysics]

Perhaps you should watch the 165 minutes of videos I have which go over all of this in more detail?www.flippingphysics.com/ap-physics-c-review.html