Conservation of Momentum In Two Dimensions - 2D Elastic & Inelastic Collisions

Conservation of Momentum In Two Dimensions - 2D Elastic & Inelastic Collisions - Physics Problems

Рет қаралды 503,765

6 жыл бұрын

This physics video tutorial explains how to solve conservation of momentum in two dimension physics problems. The total momentum in the x direction and in the y direction must be conserved separately. Inelastic Collisions occur when momentum is conserved when kinetic energy is not conserved especially in the case when two objects stick together after a collision. Elastic collisions occur when both momentum and kinetic energy are conserved. Objects bouncing off each other usually occur during an elastic collision.
Impulse and Momentum:
• Introduction to Impuls...
Conservation of Momentum:
• Conservation of Moment...
Rocket Propulsion:
• Rocket Propulsion Phys...
What Really Is a Force?
• Physics - What Really ...
Inelastic Collisions:
• Inelastic Collision Ph...
______________________________
Impulse Momentum Theorem:
• Impulse Momentum Theor...
Force-Time Graphs:
• Force Time Graphs & Im...
Ballistic Pendulum Problem:
• Ballistic Pendulum Phy...
Elastic Collisions:
• Elastic Collisions In ...
Impulse & Momentum Test Review:
• Impulse and Momentum C...
_____________________________
Center of Mass Problems:
• Center of Mass Physics...
Center of Mass - Calculus:
• Center of Mass & Centr...
Intro to Rotational Motion:
• Rotational Motion Phys...
Full-Length Videos and Worksheets:
/ collections
Physics PDF Worksheets:
www.video-tutor.net/physics-b...

Пікірлер: 162

@TheOrganicChemistryTutor Жыл бұрын

Physics PDF Worksheets: www.video-tutor.net/physics-basic-introduction.html Full-Length Videos & Exams: www.patreon.com/MathScienceTutor/collections Impulse & Momentum Practice Test - 47 Problems: bit.ly/3Qj9FjO Next Video: kzfaq.info/get/bejne/fMyReMWi0tyvgXU.html

@adelgamer1684 Жыл бұрын

Hi. I have a really important question about this video and I would be really grateful if someone could help me! From what I know, when a ball hits a ball with the condition that the vector of the collision is pointing from the center of the first ball to the center of the second one, than the direction if the ball, which is being hit, would be the same as the direction of first ball, because as mentioned, it is a “center to center” collision. So I come to the conclusion that the case that is described in this video is possible, if the collision vector is not pointing at center of the second ball and so, we get different angles of the 2 balls, telling us the exact direction of each one. Am I missing something, or did I catch this right. 2. Question (I am really sorry😅) If we have a different scenario, where you have to calculate the angles of the 2 balls after the collision, do the speed of the balls after the collision have to be constant? For example in air-hockey, the speeds are not constant because of low friction. So do I necessarily get different angles based on inconstant speeds? This is important for a project, so it really would help a lot if someone would help me…Thanks to you all!

@jasonmaxwell9580 5 жыл бұрын

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@school_pizza 4 жыл бұрын

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@yashpatel5321 2 жыл бұрын

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@Hvghyg6 2 жыл бұрын

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@school_pizza 2 жыл бұрын

@mustafa idris I was almost done, but wanted to drop out so I switched out of my Bachelor's of Computer Science degree to just finish an Associates in Lib Arts. I have like a 3.7 GPA with 1 class left.

@school_pizza 2 жыл бұрын

@mustafa idris Some of the 4th year classes were too much for me without a tutor and I told my advisor I wasn't going to put in the time with them

@MoMorelife 4 жыл бұрын

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@ThatWasherNerd 4 жыл бұрын

Mo Mo nice

@triunnbjorn3610 4 жыл бұрын

Dude got me Through Chemistry 1 and 2, Biology 1, a multitude of algebra classes, and now Physics.

@nicholaslowell9823 7 ай бұрын

How did you do on ur midterm from 4 years ago?

@MoMorelife 7 ай бұрын

@@nicholaslowell9823 not too hot but I passed the course! good luck to you!

@libanfarah9142 7 ай бұрын

Sam question in mind loll

@reynolddlm 6 жыл бұрын

Out of all collisions video tutorials, this made me see the light.

@2000camarena 4 жыл бұрын

Your ability to explain concepts in such a simple manner never ceases to amaze me, keep up the great work!

@dennisafrifahboateng9908 4 жыл бұрын

Luan Do he’s really good

@ZAsym 2 жыл бұрын

he may be an organic chemistry tutor, but don't let that fool you. he can teach it all

@_empty_4945 2 жыл бұрын

So true. This dudes got chem, bio, physics, math, and even financial stuff on his channel.

@hentai6582 2 жыл бұрын

Can he teach me how to get a gf?

@ZAsym 2 жыл бұрын

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@Human-san 5 ай бұрын

@@hentai6582 Be a hot romantic. Girls love that.

@aname-kg3cb 7 күн бұрын

@@hentai6582 that is beyond his rizzics

@LJ-ml7oz 5 жыл бұрын

my teacher taught this for 1 hr and i dont understand shit. im 2min in right now and everything is cleared. thanks dude!

@ahmeddraza 5 ай бұрын

No matter how old your videos are, they always help. I wouldn't have passed many exams without you

@cameroneinstein546 Жыл бұрын

Your explanation in physics, chemistry and maths are so good that even my teachers requests us to watch your videos.

@gabrielpetta3001 3 жыл бұрын

This exact video saved my physics lab, no other examples I could find had two unknowns. Thank you so much!

@mbrentharris 3 ай бұрын

You are probably one of the most brilliant of persons, that I have watched on KZfaq. Thank you for your videos, I have learnt a lot!

@TM-tj7ou 4 жыл бұрын

ive been having trouble with 2d momentum for so long but now its a lot clearer.......thanks a bunch!

@Addicted-A1 2 ай бұрын

I'm having my end sem in 9hrs and this is the only channel I can rely on

@giftmaimba4417 2 жыл бұрын

This one z the best Organic Chemistry Tutor I have come across so far.....u add to my Degree success

@matthewcochran94 3 жыл бұрын

You literally explain this so much better than my professor

@chaeairsoft 4 жыл бұрын

what if they do not give you an angle for the 3kg ball at rest, only for the initial ball?

@mbrentharris 3 ай бұрын

Incredible mind, who explains work with such great ease!

@kumudupremarathne1453 5 жыл бұрын

I've watched many of ur videos related to physics. When I am cramming in the last minutes before the exam ur explanations are vital.I am really thankful ur lit af. IF U R LOOKING UP IN THE COMMENT SECTION BEFORE WATCHING THE VIDEO..TRUST ME THIS IS WORTH SPENDING UR TIME.. 👍 this comment if u think it's true

@gprofisfreddymul 4 жыл бұрын

How do you calculate the collision number? Why are the results negative? Please explain.

@MrGallinavoladora Жыл бұрын

This is just what I was looking for! Thank you so much!!!!

@leechimfwembe 5 жыл бұрын

Thank you for your videos there changing lives here in #Zambia

@jasstan180 4 жыл бұрын

What if it’s the other way around. And you’re looking for the angle and final Velocity? Only. I’m talking about an inelastic collision where they stick together in the end. I don’t know if this makes sense to anybody

@user-tr5wx2bv5u 6 ай бұрын

love you man , loved your video thank you so much , may GOD bless you dude

@spaghettilicious2250 2 жыл бұрын

Bro im in college and my class is all online and the teaching style is dog water. Im litteraly learning it all from you.

@kangmingu7995 4 жыл бұрын

This helped me soo much on my physics ap test thank u

@Lortagreb 5 жыл бұрын

Perfect thanks. Great as always.

@exodus58 3 жыл бұрын

the final speed in x and y direction must be different for momentum to be conserved?

@cristondingding1038 2 жыл бұрын

Thank you for the tutorial. Hope for more:))

@adelgamer1684 Жыл бұрын

@studyingd5565 Жыл бұрын

3:30, in here if we write 30 degrees above the x axis is it cos 30?

@Thelast_timetraveler 8 ай бұрын

You are mad intelligent!!! You know physics, chemistry and maths!?!? Sheesh!!!

@rganaiktasl9482 2 жыл бұрын

Very well explanatory.. love it... soli kela❣❤✍✍

@connorking1386 4 ай бұрын

Hello I have loved your videos ever since I was a little undergrad. I did notice if you take your final velocities and plug them into the kinetic energy formula, energy is gained. Could you explain this?

@dragcraftmaster7 Жыл бұрын

Super well explained thank you

@dominicpakula7813 2 жыл бұрын

What if you are only given one angle and one speed vector? This doesn't work in that case

@rysonwell5071 5 жыл бұрын

Tq it was help me a lot

@adrianneadonis7401 29 күн бұрын

Thanks so much 👍🏻😊

@lenael4747 4 жыл бұрын

This guy is awesome ❤️

@helpontheway7856 5 жыл бұрын

Much love brother

@medotedo8410 3 жыл бұрын

But when I am substituting values to verify the conservation of momentum the answers are not the same !

@LS-17 10 ай бұрын

Bro you are the goat man. Thank you so much!

@fahimal-huq6867 6 жыл бұрын

THANKS A LOT

@asrithkatragadda6891 3 жыл бұрын

goat himself saving millions, the hero of all high schoolers

@nun-much343 3 жыл бұрын

EXACTLY MY TEACHER DOES NOT KNOW HOW TO EXPLAIN SHIT ITS SO ANNOYING

@jesusmrosario-claudio4104 3 жыл бұрын

Thank you once again.

@roknagor 5 жыл бұрын

how do you solve it when only one of the degrees is given though :(

@machbooks 4 жыл бұрын

Kahn Academy has that version

@ernestdaka7825 4 жыл бұрын

Asante sana

@nataliabacic 4 жыл бұрын

Can someone explain to me why sometimes we use p^2/2m and sometimes 1/2mv^2 in the formulas?

@karishmasawhney21 3 жыл бұрын

Hey. p=mv In the equation 1/2mv2 if we multiply the numerator and denominator by “m” it becomes m2v2/2m..Put p2 in place of m2v2 as mentioned in the first line! Hope it helps

@hopeworld4247 4 жыл бұрын

If you don't mind senpai, can you make another video about collision in 2D? I want to practice solving more 🥺

@user-nd9tz5tc1b 5 ай бұрын

Thank you so much sir

@hajranaidoo9037 3 жыл бұрын

Love this!!

@Song-ub9rk 3 жыл бұрын

why is m1v1x' -ve (why cos(-30) ), isn't the horizontal component pointing to the right?

@jeewoo7195 3 жыл бұрын

yes, and cos(-30) = cos(30), as in they're both positive

@hectorgrand3214 2 жыл бұрын

I dont get how you can sub in the y value with the x value, towards 7min. Plz somebody explain 😭😭

@lethbophilip6365 2 ай бұрын

Lot appreciation ❤❤

@betul-ev2fu 3 жыл бұрын

*TYSM!!!!!!*

@andrewmartinelli1844 3 жыл бұрын

we know no king but the organic chemistry tutor

@fatihahwahida8123 4 жыл бұрын

thank you sir

@edde7833 3 жыл бұрын

I swear if he was my physics prof I would attend all of his lectures

@zohaibgulawan9070 2 жыл бұрын

Faxx

@ExcitedGiraffes-zt1qc 2 ай бұрын

You are a king

@sdjdavies42 3 жыл бұрын

Thank you

@sugar4936 6 жыл бұрын

so where is the inelastic collision problem at?

@mindwipe0074 5 жыл бұрын

I know u prob dont care anymore but if the problem states that its an inelastic collision do this and if its an elastic collision then u can do this too but u should just keep in mind that the kinetic energy is conserved, just in case ur teacher decides he wants to make his student's lives more miserable and gives u another variable to solve. KEi = KEf

@Ishaan35 3 жыл бұрын

Elastic : kinetic energy and momentum conserved Inelastic: Only momentum is conserved

@paulsabatino625 2 жыл бұрын

Very clear explanation, but I do see a problem with your example. You show the balls moving at right angles to each other after the collision. This is not possible when the masses are unequal. If you calculate the kinetic energy before and after the collision, you'll find that the kinetic energy is greater after the collision. This is impossible, even for an inelastic collision.

@PedroLopez-jv2yv 2 жыл бұрын

No one seems to have pointed this out. There's more energy after than before.

@blazar5701 3 жыл бұрын

I am a 6th grader, and I am learning about physical science. This actually makes so much sense, its like a solved puzzle.

@moonbunnies5216 2 жыл бұрын

You learn this at your 6th grade????! This is in my diploma course what country are you from omg

@blazar5701 2 жыл бұрын

Lol, yeah, I am in US, we were learning about basic motion in physics but I wanted to go a bit further in depth so I could understand everything that was taught, and also for extra knowledge in the future. But I'm sure this type of physics is taught throughout highschool and college, something that is very important so it is repeated.

@moonbunnies5216 2 жыл бұрын

@@blazar5701 damn that mindset of yours will bring you to places in the future. I wish I was as dedicated as you back in the days. Keep it up, I'm sure you will achieve great things in the future :))

@blazar5701 2 жыл бұрын

Thanks man, hopefully!

@thisismyoutubechannel 5 жыл бұрын

god bless u

@raadavijithalimurtaza951 Жыл бұрын

why is it cos?

@davidalacabo4298 Жыл бұрын

Is this elastic or inelastic collisions?

@samfogelson2050 3 жыл бұрын

Why does he use Cosine and sine?

@Hercrati 3 жыл бұрын

For the end answer, is it bad that you got one positive and the other to be negative?

@Sir_Isaac_Newton_ Жыл бұрын

youre not smart are you

@chateaubunny 3 жыл бұрын

DUDE I LOVE YOY

@ICantSeeYourRepliesDickhead Жыл бұрын

I love you man

@natnaelendalkachew8458 3 жыл бұрын

Not all heroes wear capes like fr im barley hanging on with wht my teacher teaches me but you damnn

@dauthuc8807 10 ай бұрын

Love you dear you are so good

@malikandrew8887 2 жыл бұрын

Hi I'm malik Andrew from Nigeria I have a little problem on momentum and impulse

@ThatWasherNerd 4 жыл бұрын

5:37 Someone is angry behind the wheel

@gartyqam 3 жыл бұрын

i dont get it. how is he angry

@ThatWasherNerd 3 жыл бұрын

@@gartyqam If you listen carefully, you can hear a long horn honk

@gartyqam 3 жыл бұрын

@@ThatWasherNerd oh i didnt even realize dat haha until i listen VERY CLOSELY D:

@dhanalakshmik2226 3 жыл бұрын

@@gartyqam so u listened on the horn not on the lecture lmaoo😂🤣

@aryajoshi8069 3 жыл бұрын

goated man

@JasonBurnettsProfile 4 жыл бұрын

I followed you, but the problem is that you are giving us the angles to start with. How can we determine what angles the two objects go off at? In other words, in the real world, you have a 6kg object hit a stationary 5kg object going 6km/hr, how do I determine the 60/-30 angle split?

@zakiya7894 6 ай бұрын

i actually love u omg im watching this 2 mins before my final 😭

@fahadkhaled5056 4 жыл бұрын

Love you

@MariePeters11 8 ай бұрын

Amazing video, Sir! However, I have a question @5:24: Shouldn't V1y' = -V1*sin(-30deg)? I thought we also have to carry the sign of the direction of the component. Thank you in advance :)

@vm8856 7 ай бұрын

He is, the direction is 30 degrees so he's making that part negative

@TroubleWoe 5 жыл бұрын

It’s not -30 degrees for the x component for v1. Its moving to the right so it should be 30 degrees positive

@granthqweqw5244 5 жыл бұрын

It is moving down though so It would be -30° if we think of it like we do in the video

@subhan12340 5 жыл бұрын

Cos(-x) =Cosx so it doesn't matter anyway

@joanofarc9793 6 жыл бұрын

Bravo sir, bravo

@stevendee6800 3 жыл бұрын

Why are you better than my tutor it’s annoying

@jungiejg 6 жыл бұрын

what does prime means?

@reynolddlm 6 жыл бұрын

Jungie Cual prime means final, i guess

@deborahdouglas682 6 жыл бұрын

final

@LJ-ml7oz 5 жыл бұрын

its just something you put to differentiate initial from the ones after. its like a marker.

@machbooks 4 жыл бұрын

means after a change, two primes would be after two changes

@Ariana-sf3li 6 жыл бұрын

You sound like Billy Russo from the Punisher

@diavolo_didnt_deserve_it1118 4 жыл бұрын

he doesnt.

@user-ne8yl4bw2k 4 ай бұрын

It is solution for freshman for long periods

@coreyb8080 3 жыл бұрын

Im in 5th grade and really benefitted from this video! Maybe some more challenging problems would be better however I solved this faster than I pressed start to the video.

@WyattXD 2 жыл бұрын

damn bro

@jimhahn2665 2 жыл бұрын

There's a clear error in the derivation. Look at KE before and after. KE before = (1/2) * 5 * 6^2 = 90 KE after = (1/2)*5*(5.2)^2 + (1/2)*3*5^2 = 67.6 + 37.5 = 105.1 KE cannot be greater! Also, a commenter said that the degree total was 90 and that could not be, because the masses were not equal. Well, I don't think so. If the angles total to 90, then the collision is elastic irrespective of the masses.

@jimhahn2665 2 жыл бұрын

I was wrong, and therein lies the problem. The angles total 90 ONLY if the masses are equal. These masses are not equal so therefore the angle total cannot be 90. So the problem is overspecified. The only way to solve it is to put extra KE in, which is kinda illegal. No? Cos(theta+tau) = (v2/2*v1) * (m1^2 - m2^2)/(m1*m1) The classic elastic m1=m2 case results in cos(theta+tau) = 0 which requires theta+tau = 90degrees.

@daveschorrtube 6 ай бұрын

Yeah, he shouldn't have said that the collision was elastic.

@tebohophomane9058 3 ай бұрын

Legacy ❤❤❤

@santiagosanz3 2 жыл бұрын

sos god chabon

@vedulabs766 3 жыл бұрын

Look at Virtual Laboratory (3d real time WebGL) about Momentum Conservation (absolutely elastic collision in particular) in mechanics at vedulabs.com/

@ShubhamKumar-qc1fy 4 жыл бұрын

🙏🙏🙏🙏🙏🙏🙏

@dulinadissanayake7560 Ай бұрын

Its easier to solve it without calculating decimals

@darkslayer5558 Жыл бұрын

GOAT

@abdultarar1408 Жыл бұрын

Very difficult to understand 😢

@shoopala24 3 жыл бұрын

fwiii

@thegaspedal1440 2 жыл бұрын

common w tate

@wingwang5188 2 жыл бұрын

heehee

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Daddy

@jeslyna4907 Жыл бұрын

Hey guys! Jesus is coming on a day we least expect. So plss use the time you have now to get right with Him and call upon Him, He loves us all💞

@ayushchand8730 2 жыл бұрын

Your teaching is actually too complicated, what's taught is our country is less complicated

@AGXJDM 2 жыл бұрын

wdym?

@ayushchand8730 2 жыл бұрын

@@AGXJDM some of his teachings are way too detailed when theres actually easier ways to find the same answers and some of the problems I'm looking for arent being taught by him I guess

@AGXJDM 2 жыл бұрын

@@ayushchand8730 what country are u in that is teaching it less complicated?

@ayushchand8730 2 жыл бұрын

@@AGXJDM fiji