How can someone dislike such knowledge transfer ... and for free ??? This is such a great physics teach ! Thank you Sir. !!!!!!!!!!!!!!!!!!!!!!!!

@sailordou

4 жыл бұрын

Missclick I guess

@soisun2658

4 жыл бұрын

Many of the dislikes, if not all, sometimes, are from KZread itself. Believe it or not, that's the truth. YT has no interest for a video to get only likes. So they keep the balance "right".

@muhammedalshameri801

4 жыл бұрын

Physics haters I guess

@ilmostro16

4 жыл бұрын

I’m convinced there’s a small percentage of people out there which are always acting as trolls. They thumbs down everything no matter how good it might be. Think Joker... they just want to watch the world burn (but all they have the balls to do is thumbs down some videos lol)

@goatdwarfs

4 жыл бұрын

I do not dislike the premise(free knowledge transfer), but I do dislike this video because of the methods he's chosen to explain this concept. Just iterating through different pulleys by calculating tension is not teaching physics, its doing algebra. Its lessons like this that make physics seem dull to certain populations, and physics is not dull. Here are some concepts I would've loved to see elaborated on: Why is the weight sometimes attached to the rope & other times attatched to the pulley? How does the tension in the rope fixed to the structure change through the presented configurations? What movements in the system result in the operator having to pull more length of rope in configurations with more mechanical advantage?

I'm 64 and NOW I finally get it 😁 Thank you!

@MichelvanBiezen

4 жыл бұрын

I am still learning new things every day myself. :)

@khalid969

4 жыл бұрын

I'm 52 and I studied this in school but forgot how it worked. Now I'm going to remember how it works forever :D

@lasol2474

4 жыл бұрын

OvalWingNut, I am 65. I wish that I saw this lecture last year.

@dleivam

4 жыл бұрын

@@SharpObserver1A Talk is cheap.. Let's see your video with a better explanation.

@dickfitzinya3082

4 жыл бұрын

@@SharpObserver1A Yeah, but the 99.99% of us here watching interesting physics videos mixed in with funny cat videos really don't give a sh!t.

When my teacher tried explaining this to the class they didn't mention that you would have to pull it longer for each pulley. Saying that helped alot thanks

@albertoolmos21

4 жыл бұрын

Distance x Force = Work. This means that "moving" pulleys allow you to do the same work with less force with proportionally more displacement. Fixed pulleys work differently.

@johnjacobjinglehimerschmid3555

4 жыл бұрын

@@albertoolmos21 How are they different. I just assume he drew the pulleys separately to show how many ... that the point of axis would only be in the free body diagrams.

@johnjacobjinglehimerschmid3555

4 жыл бұрын

@Glenn Heiselman Yeah ... in my youth my dad had a 2/3 or 3/4 rope pulley. Meaning 2 or 3 pulleys on top and 3 or 4 on the bottom .... and it felt like, when I had to roll it up, a mile of rope.

@davidschmidt6013

4 жыл бұрын

Cullen, with simple machines, it's always distance that gets traded for increased mechanical advantage. Levers are the same. If a lever has one side 4X as long as the other side (measuring from the fulcrum) it will have 4X the mechanical advantage (i.e. can lift 4x its input force) , but must travel 4 times as far. With hydraulic systems, same idea. The input 'piston' must travel however much the larger (output) piston is. Ex. if the input piston is 2 sq. inches in area, and the output is 8 sq inches, the input piston must travel 4X as far.

@tramquangpho

4 жыл бұрын

One question :For example , he only explain the tension force between two point of the pulley connecting to the object , what about the tension force on the other pulley, for example, in the second example, the one connecting to the object is 50N, but is the other one tension is 50N is too or not?

I am a retired 82 year old electrical engineer and this helped me review some of the material from a Statics course that I took many years ago! Thanks!

@trwent

10 ай бұрын

Statics is more important for civil engineering than for electrical, I would think.

@alext8828

Ай бұрын

Happy to hear that. Just saw Wm. Shatner at 93. Still razor sharp, no hair loss or grey. I wanna know what he's doing to stay young. I hope you have many more years of learning and remembering.

@thaerthaer1120

7 күн бұрын

I think it's same as the transformer in the electrical engineering reducing the voltage getting high current here reduce the force getting more distance

You truly are an epitome of a professor. So effortless and amazing. It's a joy watching your videos. Thank you so much sir.

I’m truly thankful for your content, i’ve aced at least 4 courses in uni just because of you, now graduated i owe a big part of this to you

@MichelvanBiezen

2 жыл бұрын

Congratulations! You owe it to your hard work. We are glad we could be part of it. 🙂

@ericastier1646

7 ай бұрын

You study this at Uni ?? Gosh levels have gone down dramatixally this used to be junior High School Physics class. In University you should study mechanical tensors. No wonder the younger generation have gone dumb.

@Kysushanz

7 ай бұрын

@@ericastier1646 Yeah, I learnt this in my second year in Highschool. Not only this, but beam design, polar diagrams, HP, torque etc. What the hell is happening to the youth of today???

@ericastier1646

7 ай бұрын

@@Kysushanz A lack of strict discipline, a lack of respect for elders and a degenerated media and technology that has been commercialized for bad purposes (the smartphone = dumbphone). Meritocracy is disappearing, it's why learning in school has been devalorized. This is due to the influence of floating currency attributable to the jews.

@saileshnaidu8102

6 ай бұрын

@@Kysushanz dude, i learned AP calculus when i was barely able to chew yet, u guys are pussies ngl

This is how it's done, people! Superb approach. Clean, clear opening diagram. Four examples for comparison, right in front of us. Quick overview, then right to it. I rarely enjoy teaching on the internet, but this is impressive.

@MichelvanBiezen

2 жыл бұрын

Thank you and glad you enjoyed it!

Better explained than my physics professor at the university

@spazmoidectomorf6209

4 жыл бұрын

Are you university in uk in america, I'm just curious.

@jamesd7700

4 жыл бұрын

@@spazmoidectomorf6209 He made that up. He lives in a basement.

@spazmoidectomorf6209

4 жыл бұрын

@@jamesd7700 lol, I know, I just wanted to know how the syllabus varies from uni to uni and from country to country

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍

@MuhammadAli-gn4hx

3 жыл бұрын

Dont degrade your teacher.

THIS IS A REAL ADVANTAGE FOR THE STUDENTS INFLICTED WITH THE PAIN OF COPYING THE AFORESAID PROBLEMS WITHOUT HAVING A SLIGHTEST HINT OF WHAT THEY ARE COPYING.#AMAZINGWORK.

Your ability to teach is superb! You're clear & mention the little details which greatly improves understanding. This video helped me more fully understand a problem where a pully had mass. Thank you.

50 years ago I took a year of college physics. Your style is very similar to my professors back then. Great presentation! Thanks

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

I skipped this topic in school and never got around to learning it. Now, 30 years later, I understand it, and it seems so simple!. Thank you!!

@MichelvanBiezen

9 күн бұрын

Excellent!

This teacher saved us and got us through physics30 in 30 days. It was an intense schedule and this KZread teacher was the best resource. Wish he was my teacher in life. Thank you Sir!

@MichelvanBiezen

Жыл бұрын

Glad you found our videos and you found them helpful! 🙂

Very good explanation. I studied this many decades ago and this was a good refresher.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

I was introduced to this channel in my 3rd yr in Engineering School. There is so much to learn in these videos, and it is well explained. Thank you for your lectures, good sir! You are a hero! :D

@MichelvanBiezen

Жыл бұрын

Thank you for sharing. We have put a lot of work into these (9500) videos and we appreciate this kind of feedback.

I am an Indian and at first I thought that it might be hard for me to understand but I dis it.. Thankk you so much sir!! MAY LORD SIVAH BLESS YOU!!

@MichelvanBiezen

Жыл бұрын

Thank you. Welcome to the channel! 🙂

You make it seem so easy. Thanks professor/teacher.

It's been so long since I did physics, this brings it all back, I had forgotten how simple pulleys can be so easily calculated

I am working on a pulley system for an antenna tower. I needed a refresher about pulleys learned back in my college days. You're explanation was fantastic and actually helped me remember things I had forgotten. Thanks! --Steve

@MichelvanBiezen

3 жыл бұрын

Glad I could help

Thanks, Michael van Biezen for your pully power demonstration. I am no Brainiac yet I can learn the principles such as you have narrated for us per the above video to understand the importance of each required principle.

I am 36 years old. In my high school years ,No one understood this lesson to me that way. Thank you very much for this practical information. I wish you continued success.

@MichelvanBiezen

Жыл бұрын

Thank you. We are glad you enjoyed the video. 🙂

Very nice job. Your video acting ironically as a set of pulleys and I was able to lift the load of the understanding which I couldn't figure out before, and deposit it into my head. Thanks

@MichelvanBiezen

2 жыл бұрын

😂🙂😂

After watching other videos on pulleys I get a basic understanding. But I found myself asking “But how or why?” No one explained that part of the pulleys. Or did that it didn’t register with me. But your explanation left me with my question answered. You’re an awesome teacher!!!

Awesome lecture! I wish I found these lectures years ago when I took introductory mechanics so I would've loved and appreciated it more.

@MichelvanBiezen

3 жыл бұрын

Glad it was helpful!

Seriously, you brought me through my Engineering Degree. Thank you for ALL your videos.

@MichelvanBiezen

2 жыл бұрын

Thank you for sharing. All the best to you.

I'm sure there are university students out there who spent 90+ minutes on a lecture for this to be explained poorly, while this man tells it in 5 minutes so clearly my 7 year old sister understood it perfectly.

All you need is a good teacher. Thank you Sir!

I am inspired......... Your articulation is fabulous...

@azaanahmad6265

6 жыл бұрын

sir you are no less

@kamesh7621

3 жыл бұрын

Sir your not less then him

@shahdnour5430

3 жыл бұрын

@@azaanahmad6265 m

@shahdnour5430

3 жыл бұрын

@@azaanahmad6265 .

@shahdnour5430

3 жыл бұрын

@@azaanahmad6265 Thanks

This guy is one that can be surely said as a Very Nice teacher.

People forget how amazing these simple things are and how efficient they are. Still used today in all our construction projects. Cranes are just giant pulleys.

@MichelvanBiezen

6 ай бұрын

Good observation! Yes, they are used in many applications.

Clear, efficient without any unnecessary blabla, Brilliant!

@MichelvanBiezen

Жыл бұрын

Thank you. Glad you liked it! 🙂

Thank you, sir. You have been the reason for my understanding of many issues that help me to finish my major and now i have a double major diploma in biomedical and electrical and electronics engineering. Thanks alot sir i really appreciate your efforts 🙏.

@MichelvanBiezen

9 ай бұрын

Congratulations! You have accomplished a lot. We are glad to have had a small part in it.😃

Beautifully explained, to the point and simple. Thank you.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Nice to see this explained as I have always just took pullys for grantedmm Thanks

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Wow!... Clearly a good example. Thanks a lot, Professor!

I... I might actually have a chance of passing my ASVAB test now... thank you so much sir, this is amazing

@MichelvanBiezen

3 жыл бұрын

All the best

Great explanation! Now, i need to get an understanding of how to actually rig pulleys in a series like that.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

@aarondavis5386

3 жыл бұрын

If it help you can visualize it as two pulleys with multiple wheels on a common axle where the smaller wheels are behind the larger ones from a side perspective.

I noticed this is 8 years old, but I had to comment anyway: If you factor in the efficiency of each pulley (frictional losses), you may no longer get mechanical advantage after about 5 lines. If a pulley was .9 eff, then it would take 110 lbs of pull to hoist 100 lbs of load. A spread sheet will show that the pulling force no longer decreases when continue to add lines and pulleys.

@MichelvanBiezen

2 ай бұрын

Yes indeed. That said, pulleys heavy very little friciton and do not require that much energy to rotate them.

Thank you sir. t had been a problem for me to understand how pulley works in AP physics, now you clarified it to me.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Straight to the point, clear and well presented. LIKE!!!

AT this point, we can learn everything we need to know right here on the internet from brilliant people like this guy....200k for college? I dont know...i hope that requirement (societal requirement) changes sometime soon

@Dislob

4 жыл бұрын

200k is only for the "official" little paper at the end.

@aarondavis5386

3 жыл бұрын

Yes and no certainly I agree that college is over priced and you can learn almost anything from internet sources, but you may not know what you need to know. I think there is still value to an institution that defines what knowledge is required for a particular field and requires a proof of understanding

Seems a lot like a lever and fulcrum. great video!

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

@aarondavis5386

3 жыл бұрын

I mean in the sense that you can multiply a small force by applying it over more distance I guess so

Thank you Doctor....You are a great instructor/Teacher.

I always wondered how a pulley works. Thank you!

Все понятно. Спасибо!

I know it’s probably the norm, but I am so happy to see the metric system in an US physics video

@MichelvanBiezen

2 жыл бұрын

You're welcome 😊

That is brilliant and simply explained, I have never understood how the pulley system worked, now I do, thank you!

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Short and clear explaination of problems that we'ven't a Solution.....thanks a lot Sir!!! Your concept is very valuable💪💪💪

That was brilliantly done sir! You taught me something in 5 minutes that I had failed to understand in 3 days.

@jiniustech9959

4 жыл бұрын

3 days? I didn't understand for a month

I'm curious about the forces applied to the line itself in these MA systems. According to the laws of pulleys in example 2, you could lift 100 newtons with a line that was only rated for 50 newtons? The work is being done, in my mind that 100 newtons of force has to be acting on the line in the middle of the lower pulley.

@patrickbroyer5518

4 жыл бұрын

It's 50 Newtons pulling to the left balancing 50 Newtons pulling to the right. So the tension would be 50 Newtons (ignoring the traction on the pulley and stretch as the weight is applied.)

Thank you, that was so well taught that not only do I now understand pullies better but it makes complete sense to me

@MichelvanBiezen

Жыл бұрын

Thank you for your comment. Glad it was helpful 🙂

Best video to learn about Pulleys Thank YOU

Great,thank you master.

@babarasif1540

2 жыл бұрын

Hiii

@babarasif1540

2 жыл бұрын

Follow me on instagram babar Asif 000

I just have my JEE entrance in a few months and this helped me revise my Atwood Machine dynamics in a single go, Thanks a bunch Sir 🙏✌️✌️

@MichelvanBiezen

2 жыл бұрын

Good luck on your JEE test!

@82h4dheu6

2 жыл бұрын

Got postponed right ? To June

@eternalmangekyou968

2 жыл бұрын

@@82h4dheu6 August

@82h4dheu6

2 жыл бұрын

@@eternalmangekyou968 Advance august And mains June and July Btw I'm jee 2023 aspirant

@eternalmangekyou968

2 жыл бұрын

@@82h4dheu6 best of luck for it , im not pretty much mains oriented , it's rather a way for me to appear inthe Advanced paper for which I've prepared for 2 years

Fantastic, unbelievable explanation, thanks sir... 🙏🙏🙏

Thanks for a simple, straightforward explanation with nothing omitted.

@MichelvanBiezen

Жыл бұрын

You're welcome! Glad you enjoyed it. 🙂

God bless humans like you :)

If with no formal training you understand the theory, principles, function and use of mechanical advantage then this should be a breeze to grasp. Sometimes, with no formal education necessity forces one to discover ways to make work less burdensome. And the lever and pulley are the perfect place to start.

Best video to learn about Pulleys Thank you .

Dr. Stone brought me here. If only I had watched this in high school. Now I am working as a software engineer and I don't need to use this information about pulleys but watching the Dr. Stone anime made me interested in science again and a lot more. I highly recommend that anime if you are interested in science

why am i going to uni when your free content is better?

@axelnils

4 жыл бұрын

Yo wut Triggered much?

@kurtshaw229

4 жыл бұрын

Yo wut Thats just liberal arts people. Theres more reasonable people in STEM in my experience.

@kurtshaw229

4 жыл бұрын

Yo wut Thats just liberal arts people. Theres more reasonable people in STEM in my experience.

Sir the idea that something is hanging from the middle of the pulley makes zero sense to me unless that point rotates.. can you briefly clarify it?

Very nice, simple explanation of these principles. Thank you so much for sharing your expertise. You would have been one of my favorite professors!

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Not a single video explained it as well as you. Thank you!! :-)

Thank you sir. I was a little bit confused on this.

Thank you it’s very clear the way you x plain it

You made it much easier to understand, and within a short time.

Thanks .you always give me an answer to my questions

Professor Van Biezen: another excellent video, I really enjoy your channel, and have become a monthly donor. Another interesting aspect of pulleys, and please correct me if I’m wrong, is that the up forces must equal the down forces in the scenario in the above video. For instance, on the first pulley system, the total “down” forces are the weight (100n) and the pulling down force of 100n. Which means the ceiling is actually supporting a 200n load. In the fourth setup, the total down forces is only 125n, therefore the load on the ceiling Is only 125n So, in addition to the mechanical advantage in “pulling” the fourth setup actually reduces the load on the ceiling, correct?

@MichelvanBiezen

4 жыл бұрын

You are correct indeed.

@ashraf736

4 жыл бұрын

Force on celling in each cases are respectively- 1- 200N 2- 100N 3- 66.67N 4- 50N just draw the FBD( free body diagram) for pulley attach to celling for reaction given by celling . Dont account 100N block in this case.

@foxhound1008

4 жыл бұрын

ashraf khan not sure where you are getting those numbers from, as they are only part, not the total. System is in static equilibrium. No accelerations are occurring. Sum of all torques must equal zero AND sum of all forces must equal zero. Up forces = down forces. Down forces are the weight and whatever down force I’m pulling with. Ceiling supplies up load. If I was to put a spring scale between the final (top) pulley and the ceiling, the spring scale would show: 1: 200 N 2: 150 N 3: 132 N 4: 125 N Imagine in the second example, a 50 Newton person was hanging on the rope, not touching the floor. The 100 Newton weight is also not touching the floor. The FBD of the top pulley has a force pulling down of 150 N and a force, provided by the ceiling, in the up direction of 150N. The force distribution would be: 50 N on the right 50 N in the middle 50 N on the left

@ashraf736

4 жыл бұрын

@@foxhound1008 my mistake i forget the force due to the secondaries pullies in FBD of primary pulley(attach to celling).

Some teachers are just better, that would be you sir.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍

Made a sizable donation just now. You have peaked my 16 yr old son's interest in Physics...and mine too. Thank you.

@MichelvanBiezen

4 жыл бұрын

We appreciate that very much.

This is the best approach I've ever seen for doing pulley problems.

@MichelvanBiezen

Жыл бұрын

Thank you. Glad you liked it.

@fizixx

Жыл бұрын

@@MichelvanBiezen : )

Atlas: “Interesting...”

@lancelotshih6869

3 жыл бұрын

@William W. Campbell-Shepherd IX probably constructing a pully with a mechanical advantage so large that he doesn't need to spend energy and pain holding up the world, he can just tie himself down and lift the world

Nicest video about police I have ever seen.

You are really a great professor, thank you very much🤩

Pleasant demonstration ... with metric units. Merci pour le partage

so, 100/1, 100/2, 100/3, & 100/4 depends on the number of string. Better explanation than my univ prof haha

Dr. Stone teach me this

Nicely explained, thank you.

So simple! Thank you Sir! No formulas, just common sense.

@MichelvanBiezen

3 жыл бұрын

Glad it helped!

Şekli ortadan böl. Yük /Kuvvet kolu hariç diğer ip sayısı

I don't often condone witchcraft, but when I do, it's this channel.

@AR-fd8tc

4 жыл бұрын

We all share your concern with being caught up in the Dark Arts , but I have all confidence that within the century science will discover a perfectly rational explanation for this gravity defying allusion and trickery.

Great explanation, easy to follow and straight to the point. You are a great teacher.

@MichelvanBiezen

Жыл бұрын

Thank you. Glad you found our videos! 🙂

Excellent explanation! Well done sir. 👍

I'd like to see the force on the top-most pulley 'hanger'. It seems in the first example, that the attachment to the 'ceiling' has to support 200 N, the second only 150N, 133-1/3N for the third, and 125 N for the final example? So having more mechanical advantage just happens to also lessen the needed strength of the attachment point?

@Hipyon

4 жыл бұрын

that's antigravity know

@satrioekowicaksono7452

4 жыл бұрын

In reality the ceiling would also support the pulley weight.

@yougoattube

4 жыл бұрын

Mr. (Dr?) vB can answer authoritatively... but my thought is, the ceiling always supports 100N. Based on the assumptions, the pulleys weigh nothing, the rope/cable weighs nothing... weight at the ceiling must be 100N. That said, I expect there may be some exception between the time force is applied by pulling down, and when the pulley(s) / weight actually begin to move... I see where you’re coming from - if I am pulling on the cable with 100N, and the weight is 100N, then the ceiling must be holding 200N. Now I have a headache. Engineering school was way, way, WAY too long ago...

if he was my physics teacher i might have solved every pulley question in JEE

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍👍

Excellent description, brief and to the point. Many thanks.

@MichelvanBiezen

3 жыл бұрын

You're welcome!

Beautiful explanation, please keep doing these, u have the rare gift of clarification.

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍

To pull the 100N object up, wouldn't you need a force >100N? Just asking...

@MichelvanBiezen

4 жыл бұрын

Only with the pulley on the left. You need less force for the other pulley combinations.

@MichelvanBiezen

4 жыл бұрын

I reread you question and understand what you are asking now. You only need a force > 100 N momentarily until the object begins to move. Then only a force = 100 N is needed to keep the object moving at a constant speed. (Newton's 2nd law)

@wysiwygsd

4 жыл бұрын

@@MichelvanBiezen Bodies in motion tend to stay in motion, bodies at rest tend to stay at rest... Thank you for the responses.

@firedome8

4 жыл бұрын

Entropy always gets paid.

Then: Meh... school is boring, lets sleep. Now: Ohh let's watch a physiks class.

@oliverm8058

3 жыл бұрын

sameeee lol. Mostly because instead of taking classes that I'm actually interesting in like engineering and physics I am forced to take classes like Spanish and gym.

Awesome teaching video. That way of transferring knowledge not only help students understand theories, but also make them curious, love and study creatively. Thank you!

@MichelvanBiezen

4 ай бұрын

Thank you for your comment.

Thank you for sharing your knowledge. I have been going to gyms for years and have always been curious about the mathematics behind pullys

@MichelvanBiezen

10 күн бұрын

They do have practical applications.

Archimedes lifted a warship with his own physical power using a complex system of pulleys!!!!

@beoptimistic5853

3 жыл бұрын

https: //kzread.info/dash/bejne/h3yjxamBl9i9eqw.html👍👍👍👍👍

I learned to just count the number of pulleys so you can say 1:1 or 2:1, 3:1, 4:1 etc. so you know the ratios.

It looked so intimidating, but ur simple explanation rly made things clear. Thank you!

@MichelvanBiezen

11 ай бұрын

You are welcome.

أحسنت ، إنطلق . 👏👏 👍 Well done , go ahead 👏👏 👍

Amazing!! Would recommend 100%. I think I gained my first brain cell! Protip: try matching your outfit, particularly your bow tie.

Well, yes ... but. "You can draw a free body diagram around the object you are pulling up." That is not explained well because by the time you get to the end, that free body diagram is not just around the object you are pulling up but is drawn around the object itself and 2 pulleys. Why? Why not draw the free body diagram around all 5 objects? The explanation of that would add complexity to the presentation and would probably cause the students to scratch their heads.

Very good 👍. Now I understand. If all teachers are like you, then it will be exciting to go to class

Why I don't get these type of awesome teachers ? I understand every video I watch from him clearly 😊