2-dimensional momentum problem

[MrPEDOCTOR]

hajlan91. how about your test? all the best. 

[hajlan91]

i have a test in momentum in 2 h wish me luck

[syed0590]

I was studying, but then I took an arrow to the knee

[WTHeavenful]

now i can win the pool's tournament, thnx sal :D

[remo19841]

c u ball talker ur gtn fckn gtn it ya wee poof ya pillow biter jumpin in nboth u goat screwing shager

[ThePrincessSelena]

soh cah toa should be in blood red :D

[narcomanel]

What's the problem with elastic and non-elastic collisions? One means the 2 objects will turn into 1 after the collision, the another one - that they will just collide and move apart further.

[emzte]

This helped me understand the concept better than my textbook

[vandepu93]

wouldn't the equation (M1)(Vi1) + (M2)(Vi2) = M1(Vif) + M2(V2f) also work in this situation? I suppose if theta (30 degrees) wasn't given to you, but correct me if I'm wrong.

[11Winfield]

@vandepu93 mate listen 2 video he says exactly that at the start! total inttial velocity equal total final velocity

[st2293]

got a test tommorow and i dont know shit....... but thx to u i feel confident 5/5

[ajiekin]

why cant teachers teach like you?

[legomoviem4ker]

Ughh, AP Physics sucks. Yet, you make it a bit less frustrating. Haha, senior year = easier!

[aldcaptain]

thanks a bunch sir!

[gabrielarpio]

definitely learned more here than in college

[nytsegai]

Can we use the same process if the mass were the same?

[TheCrappyaccount]

@nytsegai of course you can

[blackdranfire]

You made a mistake at 7:34. 10 + Pby = 0. Solving for that Pby should be -10 not positive 10.

[jiggaluv123]

@blackdranfire doesn't matter if it's positive or negative, you will still get a valid answer. Just use common sense in the end.

[eliasnz]

can someone pleeeaaase explain to me why he used root square of 3 divided by 2 to solve the COS? PLEAASEE!

[HaveFaithInScience]

Amazing! Thank you so much! You should do a 3-dimensional one that would be interesting.

[starrish]

You are hilarious ! I love your random weirdness...makes physics more fun.

[NerdmasterChang]

Right now I am working on a momentum problem very similar to this one, only you do not know the final velocity of A, but you do know that it is an elastic collision and so kinetic energy is conserved. I have been working on it for an hour and I haven't been able to find the solution. If anyone could offer any advice it would be greatly appreciated.

[iThaosTM]

These lessons are so much better than my school teacher's lessons. I have pretty much no idea what my teacher is going on about. Maybe he gives us too little examples. Anyway, this stuff is good :)

[onlyAerik]

IF you want a fun read about pool (9-ball) that warps physics just enough to be fun to think about, I recommend the manga "break shot."

[nicefriend7000]

very good thank you man  .

[Dundertaker]

Could you maybe explain elastic and non-elastic collisions for future videos?

[randumbtimes3]

@Dundertaker 1/2 kx^2

k = spring constant

x = dinstance from compressed

[wizwazzle29]

@Dundertaker yes agreed!!

[lolericlol]

@Dundertaker

elastic= energy is conserved

inelastic= energy in not conserved

[rabyl123]

@Dundertaker elastic: when both momentum and kinetic values are conserved

inelastic: the exact opposite ;)

[Dundertaker]

@rabyl123 You're a year too late, I already aced that class :) (thanks to KhanAcademy, of course)

[rabyl123]

@Dundertaker lol sorry i just saw this video! its quite good!

[ANTBLE989]

why is P(By) not in negative value ...I mean it is important to have direction in the velocity ..it will affect the other values right ..|???

[violinrocks]

@ANTBLE989 That was a mistake. He fixed it at 8:26

[ANTBLE989]

Yah ..tnx ..I know.

[reck1ess77]

YAYYYYYYYYYYYYYY

[yapper1200]

thank you so much. you made way more sense than my teacher.

lifesaver.

[ballsoffury4]

If I was a chick I would blow you

[PEPE2960]

El angulo que tiene la pelota B al final es -38 creo

[aburc4126]

your a god send man... i just may pass phys 121

[mufc4everch]

@aburc4126 Haha that's why I'm here, UW?

[HPPcello2]

can't you just find the angle w/ law of sin b/c you know at least one angle will be 90 degrees and sin(90) is just 1 so it's easier if you have never had calc

[docmbc323]

he never used calculus, it was all trig

[hacksign000]

lol a pool ball weighting 10 kg.

[namornik558]

I can hear heartbeat of yours or is it something else .. ?_? Btw thanks a lot for this

[viv247]

Are you for real???

its clearly just an obstruction on the mic, aka like tapping it!

[FrozenThree]

this is going to help me on my test tomorrow :)

[xlwaiyiplx]

how did it go?

[spinsally]

can you use kinematics for this type of problem or is momentum realy important?

[m1dnightshadow]

this will help me on my exam tmrw LOL

[shacknu]

This will help me on my test tomorrow :)

[keybladewielder999]

Math and science working in perfect harmony, so beautiful.

thanks for the upload!

5/5

[DMAlivenow]

awesome

[tok3ro1o1]

Yeah me too

[fuzzbe3r]

Thanks so much ! Now I finally got it...