14 years later and you are still helping students, thanks!!
@pokeroguetrash6 жыл бұрын
You are the first person who has made any sense explaining this to me. Great video, thank you for helping
@amr-bw4gf6 жыл бұрын
You taught me more in 8 minutes than my teacher could in 3 weeks
@qasmcbraylov6963 Жыл бұрын
So agreee
@Normalguythatisbored8 ай бұрын
Fr
@b3a3n3a3n3a3s7 жыл бұрын
Never seen the masses drawn out in a straight line like that and now a lot of confusion has been lifted, thank you very much.
@thecalazoneh49176 жыл бұрын
Oh my god dude your a lifesaver, I actually understood this better from your 8 minute video then my teachers 40 minute lecture XD
@michaeljulias2095 жыл бұрын
@@beyza1624 yea i don't know where he got that also
@dylanzuke51244 жыл бұрын
You’re*
@robiulahmed Жыл бұрын
This is the most lucid explanation I've seen regarding Attwood machine physics. Every other video gets bogged down with maths. Thank you. Truly.
@w7geek9 жыл бұрын
Lasse, I hope you still read the comments, because you need to know how awesome you are. Thank you!
@seans50965 жыл бұрын
10 years later and this guy is still saving lives
@youssefabdelhamid23369 жыл бұрын
Very nice picture you drew at 7:20 good job sir.
@thy79178 жыл бұрын
+Youssef Abdelhamid had me dying..
@theguitarkid54026 жыл бұрын
Saw that in my notes while reviewing my parents looked at me like I was an idiot
@parkertyson57576 жыл бұрын
So sad he didn't draw the center of the pulley
@mahhattaheen5 жыл бұрын
Legend!!
@beyza16245 жыл бұрын
@@parkertyson5757 but how did we find the 20N and 30N ?? why multiply with 10?
@davidhickey108410 жыл бұрын
just going into my dynamics exam and I see this...this is brilliant, makes perfect sense and works brilliantly, sound!
@instaminox9 жыл бұрын
i was failing this course, there is a lot of videos on youtube that confuses us a lot however...now that I found you ... my hope increased exponentially. best wishes.
@lilac7494 жыл бұрын
This helped so much! This cleared up my questions while studying for the MCAT!
@headtroma32512 жыл бұрын
Holy crap! I've been battling this problem all night and I finally understand it, Thanks for the video :)
@rakanalmana650911 ай бұрын
Thank you so much for this video! This really helped me understand this machine before my exam I have on Physics.
@Slantedpine11 ай бұрын
Faxxxxxxxxxx
@ELewis-rk4wf12 жыл бұрын
Thank you very much. My text's explanation of the Atwood machine was incomprehensible and then I found you. You integrate the algebraic approach to solving the problem with the use of numbers and make the problem easy to solve. Thanks a lot. I'll check out your other videos now.
@mikemwila20767 жыл бұрын
this guy is really good at this ; this is his second video Am benefiting from and adding to my favorites videos now . Already subscribed !
@mithushanbalendran85934 жыл бұрын
even after 10 years of this video being out its da best
@ladybuggirl112 Жыл бұрын
this helped me so much. I’m a slow learner and have a lot of trouble with math but this was so easy to understand! Thank you!!
@borcf1557Ай бұрын
when you placed the two mass horzintal, nd said the string is one pice that conncets two masses helped so much thank you
@toaotou14 жыл бұрын
the introduction is a bit long but the later explanations are really clear! thanks a lot
@ashleequintanilla33966 жыл бұрын
WOW watching this in 2018 and now everything makes sense god bless your soul
@cherrylady12345675 жыл бұрын
Could not understand pulley system problems until I saw this, thank you :')
@sprocket60914 жыл бұрын
Thank you so much! my teacher didn't explain this type of problem very well. I'm not confused any more!
@Inggybaby9912 жыл бұрын
OHMYGOD!!! This is like the best video ever ! I have my physics final in a few days and you are a lifesaver! thank you so much! xD
@superpiggy10714 жыл бұрын
Thanks so much I have a test for physics tomorrow and now I actually have an idea of what to do
@InvadingChihuahuas12 жыл бұрын
You've helped me a lot in AP Physics, thanks!
@mr646210 жыл бұрын
thank you very much ! this video helped me understanding this test and the tension , but i'm still a little bit confused by the tension force. Due to Newton's third law , the forces are paired and equal, so when both of m1 and m2 are trying to get each other down, what should tension force be depended on? For instance,when m1 is trying to get down, it also get the reaction force from m2. When m2 is trying to get m1 down , it would probably get the reaction force from m1, lol. I'm just confused , hope to hear from you.
@trollmasta48738 жыл бұрын
wow! you are awesone 😄 glad i found this channel right before my midterms...
@abhiisnotme2 жыл бұрын
this is amazing, i never knew i would understand this until I watched the video, thanks for your help!
@sophiajager26993 жыл бұрын
Great explanation! You saved me from failing my exam tomorrow.
@katherinechen147311 жыл бұрын
Thank you for making this so simple to understand!
@amyth90044 жыл бұрын
One of the best physics series
@cookiemuenster12 жыл бұрын
Tension is a force and forces are vectors, so if something is accelerating in the direction that a string is pulling, acceleration and tension will be the same.
@jacksawhavoc10 жыл бұрын
that's the best explanation for why you do this the way you do that I have ever heard and I have heard a lot of them
@teeheejejo12 жыл бұрын
It became clearer for me, I checked rotational dynamics part III, and noticed that atwood's is a bit simpler than of the problem that the pulley is massive.
@ladypotato.98767 жыл бұрын
You are a lifesaver! I can't thank you enough!! I now understand this
@queenjessicathefirst7 жыл бұрын
YOU ARE A GENIUS SIR I HAVE AN AP TEST IN 2 DAYS
@roberthensley713010 жыл бұрын
Nice! Now I'll be ready for my lab tomorrow.
@thomasjoliveau83183 жыл бұрын
so helpful. Better than my teacher's explanation
@Stacey-r8p2 жыл бұрын
Thank you a lot! Helped with exam preparation:)
@TheNetworkGenius11 жыл бұрын
You make things so simple. Thank you
@benjaminwilliams27417 жыл бұрын
I tried to apply the Atwood Machine in the field at my job. I have to carry my 50 pound backpack up and down a 175' tower. So I thought to create an Atwood Machine using a 200' rope, two pulleys, my backpack(M1) and some weights(M2). The objective was to establish equilibrium so that I could easily take my backpack up and down the tower with little to no effort. My atwood machine failed miserably. I was able to raise my backpack (lowering the weights) with very little effort. But lowering my backpack (raising the weights) took a tremendous amount of effort - there had to have been at least 25lbs of resistance when lowering my backpack. I'm baffled in how it worked one way but not the other.
@skillet13711 жыл бұрын
Thank you so much! This video is so incredibly helpful (and easy to follow).
@PrinceAdom8 жыл бұрын
okay, can you explain how you got had m2 in the denominiator to be positive? I had a negative m2. I used the technique of summation of forces along the y-axis.
@Hbrand034 жыл бұрын
i am so late but thank you for helping us find tension, ur brilliant
@thepandagamer53314 жыл бұрын
Thanks for the help! Definitely saved my grade!
@lasseviren112 жыл бұрын
See the above description of the video for the answer to your question. I just added more text to it so that it addressed your question more directly. Thanks.
@isberg199512 жыл бұрын
Thanks a lot! If my teacher would have explained it like this, i would'nt have to spend hour after hour, trying to solve these problems by myself.
@devinrhines12504 жыл бұрын
Thank you!!! My teacher didn't even teach us this but decides to put this on the midterm smh.
@Druidicalism10 жыл бұрын
thank you so, so, so much! our provided (ripoff) textbook is of no use in working through problems like this. thank you for your time and contribution to public education!
@Adiibak11 жыл бұрын
You are a true Physics Hero.
@jityr213 жыл бұрын
At 0:58 it's easy to assume that the acceleration would be greater for the system on the right because m1 is on a level surface instead of hanging down. The system on the left has m1 hanging down., which makes it easy to assume that the acceleration would be slower. Would such assumptions be right?
@teeheejejo12 жыл бұрын
Isn't the radius of the pulley important in such cases? And when would the mass of the pulley be affecting my system?
@maximumride8862 жыл бұрын
Why did it take my teacher 2 weeks to teach this and I still didn't understand, but I watch this and its like, bam! Understand
@shabasupermayn11 жыл бұрын
I rarely see this method much simpler than the one we are taught, where we use way more messy looking algebra
@StickElite11 жыл бұрын
yeah i agree, i'm in highschool physics and we were taught ma= fa- fw -ft+ ft -fw which is basically the same but way more confusing this video helped a lot
@erikbeier95158 жыл бұрын
Well explained and precisely demonstrated.
@MyBilal199718 жыл бұрын
Why can't I use the equatn Ft-mg=Fnet? Because Ft is pointing upward(Assumed +ve) and mg is pointing downward(Assumed -ve) if we are to take the vector direction in mind.
@crazyforcats193 жыл бұрын
How would you find the apparent weight of the 3-kg mass? Is that equal to the tension?
@lasseviren13 жыл бұрын
Usually apparent weight is a normal force but for this set up the apparent weight would be the force of tension on the suspended mass.
@crazyforcats193 жыл бұрын
@@lasseviren1 That was quick! Thank you so much!
@Bakugantsuvai112 жыл бұрын
Could we have pulley problems like these with friction please?
@Paivimehr14 жыл бұрын
Clear explanation. Thanks. Like Lasse Viren. I am from Finland..
@nicolesaed10 жыл бұрын
What if the mass of the pulley has to be taken in consideration?
@lasseviren110 жыл бұрын
The following video details that situation: Rotational Dynamics (part III)
@Bethebug12310 жыл бұрын
The problem I'm working on doesn't give the tension forces for each weight (or either weight)
@moronguillo12 жыл бұрын
since there are two weights, shouldn't there be two tensions also, one for m1 and one for m2?
@Notadoc2213 жыл бұрын
@ymxyy0313 i think he is stating that the acceleration of gravity is roughly 10m/s^2 so the resulting force is 20N and 30N repectively
@aamirmateen20028 жыл бұрын
why is the tension same of unequal masses plz explain in detail.
@amr-bw4gf6 жыл бұрын
It’s very simple. they are the same rope so tension is same everywhere on the rope
@pierresstargirl13 жыл бұрын
finally, I understand how to do these problems :D
@GodlessNfree13 жыл бұрын
Nice vid but i got a question i cant seem to figure out... so for my questions the givens are m1=5kg Ft= 78.4 and a=5.9m/s the unknown is m2.. it seems so simple but i cant get it together, think u could give me a formula??
@finom9712 жыл бұрын
@genkers He was assuming the gravity was 10 m/s^2, so 2kg had a force of 20 N, 3 kg, had a force of 30 N
@notloc89934 жыл бұрын
How is it that the tension is the same throughout the rope of different weights are acting on it
@lasseviren14 жыл бұрын
For different scenarios the tension will vary but for a given scenario the tension will be the same throughout the rope. This is only true if the rope's mass is negligible and the pulley's mass is negligible or the rope slides across the pulley with no friction.
@lasseviren14 жыл бұрын
I know this did not answer your question but I just wanted to clarify what I meant by saying, "the tension will be the same throughout the rope."
@notloc89934 жыл бұрын
I understand that now . I’m just trying to figure out if there’s a formula to prove this or if there’s a visual way to show this
@lasseviren14 жыл бұрын
@@notloc8993 I'm on a trip but when I get home in a few days, I'll make a video to answer your question. For now, imagine breaking the rope into 100 little segments. Segment 2 pulls on segment 1 (s1) with the same force that s1 pulls on s2 because of Newton's 3rd law. Now if s2 has an almost zero mass then the net force on it would be m*a which would be almost 0 because m is 0. That means that the force of s1 on s2 has to be almost equal to the force of s3 on s2. Next we say that the force of s2 on s3 is equal to the force of s3 on s2 because of the 3rd law. And so on down the rope. You can see why a video would be easier than typing this in the comments.
@lasseviren14 жыл бұрын
Keep analyzing each segment of rope using Newton's 3rd and Newton's 2nd law all the way down the rope.
@ApostleOfDub11 жыл бұрын
How do you come to the conclusion that 3kg box has a 30N force and the 2kg box has a 20N force? Did you just round the acceleration of gravity from 9.81 to 10 and multiply that by the mass? Or should the force down on each box be given? Thanks.
@sea52055 жыл бұрын
joe he rounded 9.81 to 10
@Torchfang11 жыл бұрын
How did you get 24 n!
@jonathansanchez88024 жыл бұрын
love these lectures!
@aschmidt5709 жыл бұрын
You just blew my mind. thank you!
@venkatamaheshmunagala99185 жыл бұрын
Is large mass body decide the tension in spring if it does please explain.
@lasseviren15 жыл бұрын
Both masses affect the tension in the string. Once you know the acceleration of the system (by analyzing both masses), then you can use either mass and Newton's 2nd law to determine the tension in the string.
@hollyphant4 жыл бұрын
It is MiNd BlOwInG how easily you explained this to me wtf, I suck at physics dude but this is so easy now lmao
@hafsahkhan1611 жыл бұрын
I am so glad I found this
@rickytian10074 жыл бұрын
What if you put this whole system inside an elevator which is accelerating upwards?
@lasseviren14 жыл бұрын
If the elevator were accelerating upward at 2 m/s/s then it is equivalent to being on a planet with a g of (9.8+2)m/s/s. So you do the same problem but use 11.8 m/s/s. If it were accelerating downward at 2 m/s/s then you would use (9.8 - 2)m/s/s. In other words if the elevator were in free fall, then the system wouldn't move relative to the elevator (9.8 - 9.8)m/s/s or 0 m/s/s. Of course I haven't told you why this is the case. I would need to make a video to do so.
@taters112311 жыл бұрын
Watch carefully from 5:24 to 5:41. He gets the value for acceleration, which he plugs into his tension formula to solve for force tension.
@donepearce14 жыл бұрын
What is the value of g where you live? It seems to be quite a bit different round here.
@erikmjelde44288 жыл бұрын
what about torque in the pulley?
@reetisafui7769 жыл бұрын
Thank you so very much! It was of great help!
@ymxyy031313 жыл бұрын
how did he get the 20n and the 30n, or did he jsut make that up?
@sea52055 жыл бұрын
tlyang he rounded 9.81 to 10 and then x by the mass to get the weight (force)
@manasvijain83046 жыл бұрын
Wow this helped me so much. Thank you
@adelaidecanada5 жыл бұрын
This helped sooooooo much!!!! Thank-you!
@genkers12 жыл бұрын
what if i dont know the forces pulling on it?
@vinayabhat60062 жыл бұрын
Thank you so much! it finally makes sense!!
@physicswithramzeen23863 жыл бұрын
Thank you, Well Explanation...
@sea52055 жыл бұрын
Great video!
@k123mc12 жыл бұрын
how did he get 24N??????????
@taeyang11 жыл бұрын
this guy can teach!!!!!
@maixiong965011 жыл бұрын
Wow, how do you make it so easy when I am pulling my hair out!
@rachelkong10399 жыл бұрын
Thanks! It's really help me!!
@AbdulKhaleed10 жыл бұрын
Honestly, thank you so much.
@ahmedzs112 жыл бұрын
Great explanation thanks so much.
@Ruba100611 жыл бұрын
Thank you sir - from Norway
@raavirohith311310 жыл бұрын
can u give the proof of a at 4:29 min
@tauqirpashas83599 жыл бұрын
thank u soo much for posting this video...
@Actkara_Vlogs5 жыл бұрын
how are you getting 24?
@Actkara_Vlogs5 жыл бұрын
nevermind i figured it out, haha
@carlo41453 жыл бұрын
can someone tell me how did he get the 6N in 6:46
@lasseviren13 жыл бұрын
I multiplied both sides of the equation by 3 kg. So... (2m/s/s)(3kg) = 30N - Ft which then becomes 6N=30N - Ft.
@H223Tommy12 жыл бұрын
The forces are gravity * mass. In this video he simplified gravity to be 10 Hence - Force on the smaller wieght = 10 * 2Kg = 20N