AP Physics C: Momentum, Impulse, Collisions & Center of Mass Review (Mechanics)

[@matthew-3r]

Hey Flippin. I know you get bombarded with thankful comments, but I have been using your videos for the past 3 years now. I found you when I took AP physics 1, and I have came back to your videos through AP Physics C Mechanics, E&M, and now I'm in college rewatching your videos before my physics test. Thanks again for your honest work.

[@FlippingPhysics]

Wow. Thanks for telling me this. Makes me feel good about the work I have done.

[@jshao22]

Mad respect, bloody good video. I shared this with the rest of my AP physics classmates. You're doing gods work man.

[@FlippingPhysics]

Yes, please share with all your classmates. Thanks for the kind words.

[@T-money98]

If only you posted this last year when i took the exam, still used your physics 1 videos to review. Keep up the great work, all physics students around the world appreciate your effort

[@FlippingPhysics]

Believe me when I say I wish I could have had this done last year. So many videos I want to make. They take so much time. Thanks for your kind words.

[@T-money98]

hey, i can only imagine how long it takes to make a video with how you cut to all 3 of your personalities haha, Just keep doing you, we are all thankful, and I wish I could have gone to your school, you seem like a great teacher that makes physics super fun

[@FlippingPhysics]

Thanks. And, you don't have to imagine how long it takes... www.flippingphysics.com/making-a-video.html

[@somiljain7641]

Wow those 3 students look just like you!

[@FlippingPhysics]

We spend a lot of time together.

[@bvolpato]

@@FlippingPhysics So nobody will tell him?

[@sniperammow4865]

@@bvolpato plz don't tell him they are all the same person.

[@GigawattGhost]

@@sniperammow4865 I don't have the heart to tear his spirit

[@MinhPhan-mk5yo]

Center mass starts: 6:32

[@Bretton111]

I’m Cramming for the AP test tomorrow. You’re a lifesaver!

[@FlippingPhysics]

You are welcome. I hope it helped!

[@clementhilty1750]

These videos clearly take so much time, so many takes, and they are SOOOOO good. I guess that if you do it perfectly the first time you'll never have to do it again. Thanks 🙏

[@FlippingPhysics]

You are correct that these videos do take a fair amount of time to make: flippingphysics.com/making-a-video.html

[@alieser7770]

Sir, you deserve an award or something for all your wonderful videos

[@FlippingPhysics]

I wish!

[@AstronomywithManas]

Such a great way of teaching!!!! enjoyed all of your Lectures........But wonder how only 67K subs he should be in Lakhs or Million..............Keep it up with your good work!!!!!

[@GigawattGhost]

YOU ARE THE FLIPPING MAN!! AND YOUR STUDENTS ARE SUPPER SMART, they must learn a lot from you.

[@FlippingPhysics]

yep

[@TheRockstarNathan]

This is great! Thank you for putting so much effort into making an entertaining and informative video!

[@FlippingPhysics]

You are certainly welcome. Good luck learning physics!

[@zhuangeric1433]

At 1:04 before you implement the product rule, you first have to identify that whether both the mass and velocity function of time is continuous, otherwise it is meaningless to take the derivative.

[@haripatel3956]

Bro thank you so much, Im understanding so much more from you then my teacher. Im legit binge watching all the videos that i need. THANK YOU SM

[@FlippingPhysics]

Glad I can be here for you

[@saraali3640]

I really needed this video thanks for your effort .. your way of explanation is very easy I like it

[@natecarr7434]

i love how i was only taught 2 of the 11 things in this video. so ready for the AP exam!!!!!

[@MisterPhotoBomb]

Very neat and straightforward video! This definitely helped me a lot, earned yourself a sub.

[@abdullahaddous7081]

Hey! I first want to thank you for the resources your provide! I wish to deepen my understanding of Calculus to have a better idea of what's going on hehe. However, I do have a question: My teacher claims that momentum is equal to change of momentum, is that true?

[@FlippingPhysics]

Change in momentum equals impulse. 😀 www.flippingphysics.com/impulse-introduction.html

[@abdullahaddous7081]

@@FlippingPhysics woah, thanks for the quick reply. That's what I tried to convey to them. But they insisted on their opinion, causing confusion for the rest of the class. All this due to an error on a slide presentation :( thanks for the input, anyways!

[@nikunjchoudhary6551]

excellent!!!!!!! all concepts cleared

[@FlippingPhysics]

That's awesome!

[@danielkwon3062]

If there is a problem about Force of impact, what would be the example? (i.e. problem about explosion(?) problem about collision (?) ) Thank you!

[@FlippingPhysics]

These are two videos of mine about force of impact: www.flippingphysics.com/impact-force-problem.html www.flippingphysics.com/helmet-demonstration.html

[@danielkwon3062]

That video helped a lot! Thank you!

[@SuperAce780]

ur awesome. thanks for getting me through physics!

[@FlippingPhysics]

You are very welcome. Congrats on getting yourself through physics!

[@camilamendes5902]

Once again well explained !!

[@turtlefranchetti4620]

thank you for making these! My exam is today (late exam) and these videos are really helping!!!!

[@FlippingPhysics]

Best of luck on the (late) exam today!!

[@turtlefranchetti4620]

⁠@@FlippingPhysics it went pretty well!! Your videos helped a lot! :D

[@mertkangtr]

@@turtlefranchetti4620 hey there! I'll be also taking late exam this year for APC mechanics. may i ask if, was it harder? i mean compared to original one?

[@turtlefranchetti4620]

@@mertkangtrCompared to the other students in my class, it was just another test with the same difficulty. However, the testing conditions I had were worse and my proctor messed up my time as I was the one kid with extended time with 3 normal kids all taking a test at the same time. So! I would recommend talking to your AP coordinator at the school/ college prep person about that and find out the testing conditions to make sure to be prepared for the test!

[@miryamgonzalez87]

not me cramming all of these videos the day before the exam

[@gouravk5004]

Same

[@FlippingPhysics]

good to know

[@jonwoods5820]

i literally just learned center of mass calculations with this video the night before my ap exam

[@FlippingPhysics]

Please watch this video then: www.flippingphysics.com/center-of-mass-canoe.html

[@danielkwon3062]

Sorry, another question is, how does the fuction look like in the real problem with x dm or r dm? I did not get the part about dm what it means and stands for

[@carultch]

The d means "infinitesimal difference in" the following quantity. The dm refers to an infinitesimal mass element. Concepts like center of mass and moment of inertia are defined through the concept of dm. You examine each particle that comprises the system, and add up (aka integrate) r*dm in the case of center of mass, or r^2*dm in the case of moment of inertia. To make more sense of dm, you usually re-write it in terms of another variable that is easier to adjust and conceive of how to integrate, by coming up with a shape for your infinitesimal mass element. Such as replacing it with rho*A*dx, where A is cross-sectional area, rho is the density, and dx is an infinitesimal change in x. This is how you would use this, in the case of a thin rod.

[@maxstarrofficial]

BIG THANKS FOR TEACHING BETTER THAN MY TEACHER! Lol, u should have my tuition

[@FlippingPhysics]

I will gladly take your tuition. Thanks for offering!

[@jacobralls1669]

Does conservation of momentum work when there are more than two objects in the system (ex. a collision between three vehicles)?

[@FlippingPhysics]

As shown in this video: www.flippingphysics.com/conservation-of-momentum.html If the net external force acting on the system equals zero, then linear momentum is conserved for the system, regardless of how many objects are in the system.

[@BoZhaoengineering]

I swear that I learned physics more from Flipping physics than my entire first two years of college.

[@FlippingPhysics]

Glad to help. Sorry about your first two years of college...

[@jueedhar5449]

Amazing review !!!

[@FlippingPhysics]

Thank you! Please share with all your friends!

[@bbrk24]

*uses N/Hz as units for momentum*

[@n0limits]

Bo is so chill

[@HorizonSpeed26]

this makes ap physics 1 make a bit more sense with a bit of calculus understanding

[@FlippingPhysics]

Yeah. Calculus actually makes physics more understandable.

[@aedanmckee8698]

Good stuff

[@bvolpato]

Thank you!

[@FlippingPhysics]

You are welcome!

[@dennyhe9253]

gotta love Bo!

[@FlippingPhysics]

Many people seem to. Perhaps they identify with him?

[@dennyhe9253]

just took my physics c midterm yesterday! your videos helped me get an A!

[@antoine25]

Life saver

[@FlippingPhysics]

Hyperbole appreciated.

[@caseyfarrell5760]

whos ready to pass this exam tomorrow? good luck everyone

[@alexkrull1252]

Tell me why the students are in class if they know everything already??

[@FlippingPhysics]

They are there for you.

[@alrayyaniQtr]

third

[@kandktalk]

second

[@danshen3827]

Hi

[@justinfoto]

first.

[@irisgu4347]

Your video confused me and my whole class.

[@Prod.CoreyGazit]

late night cram

[@therewasonceacatnamedmeimc247]

.

[@jamesfairley2887]

can you like not be obnxious

[@FlippingPhysics]

Looks like we both suffer from the same malady.