Dave is the guy who looks like he plays guitar in a grunge band until you realize he's the best physics/chemistry teacher online.

Once my physics course is over, I promise I will donate to your channel. Thank you, Professor.

I like the way that you actually explain what torque is and not just how it is calculated

Thank you for another lucid, consumable video. Your work has genuinely gotten me through my semester. Please keep making more content!

Professor Dave- I just really want to say thanks - Your video's are helping me really understand and do well in my Engineering Physics class I love the way you explain Physics - YOU ROCK!!!!!!!!!

Proffesor Dave, I watched your videos for calc 1 and 2, and gen chem and now, I watch them for physics, ochem, and multivariable calculus. Thank you so much. I couldn't do college without you, organic chemistry tutor, and Pauls online math notes

"Clocks are negative" is how my textbook said to remember that clockwise motion is negative and hence counterclockwise is positive.

i love how he gives us real life examples of usage of torque instead of just telling us that it's a thing that exists that we simply have to accept immediately

Professor dave saved my life.

My favourite...i've been sharing it to my friends..keep up the good work sir

Why doesn't this video have more views, why do you not have more subscribers, why do you not have thousands of likes?!?!?

This is seriously the best learning channel on KZfaq that is in English. Most other channels don’t go in as much depth as this one. 😄

great video as always! thanks!

Guess who has their exam tomorrow?

SWEET AND SIMPLE

You are the reason I did so good on my OChem final. Hope it’ll help me pass physics!!

Great explanation. Thank you so much!

You are a real professor. Your tutorial help me alot

Thak you!! Great video!! I was really happy to find info about inbetween perpendicular applied force and parallel applied force for torque

Thank u professor Dave, I understand physics easily through your videos, keep it up sire :)

Thanks for the help I have an exam in a week and this video along with many others helped me to understand the concept.

I like the way you discuss cause you give a background knowledge about the topic for us to easily catch up

Dope Dave! Thank you!

I had to skip this lesson to study for a calculus test I had the next day, and this video is extremely valuable to learn the topic, so good that I had to write a comment about it.

I wish I could have teacher like professor Dave in my school. He's really great.

You really explain it well Sir....I was stuck in this concept like forever until I saw your vid thanks for the vid ❤️❤️❤️❤️...

You give the best explanation with nice pronunciation and accent you know🤩🤩

watching this before my ap physics exam tomorrow. thanks sm for ur help this year.

his intros is one of the most underated , i can get it outta my head at all ever since i heard it .

you are much better than my actual professor lol. I finally started understanding after this video. Thank you so much for sharing your knowledge to people :)

Thanx Prof. Dave! 🎉

Oh, I loved this!

PROFESSOR DAVE!! you are amazing ! these videos have literally changed my semester! spreading the word around class as best i can ! Also- you have to turn the jingle into a ringtone - the fam and i run around singing the song all day just for laughs

The best thing about prof. Dave is he quikly summarizes big stuff 🤯 in smaller chunks 👍🤩

Professor Dave is truly a science star.

Very good explanation Sir.., thank you

great video

professor dave has single-handedly explained the entire physics syllabus to me ill- let u know if i pass my exams -thanks professor!

good explaination

wow, thanks a lot professor, this saved me a hour

amazing video

Thank you so much

Thankyou Sir!

I came into the right place, this channel is obviously a lifesaver

I didn't know Dave also teaches physics and chemistry online besides his guitar playing in FooFighter

Thank you sir

Thanks dude, this was great!

Thankyou sir!

Sir please also give us some more questions which are in HOTS so that we can know how to apply those concepts ! Thank you sir

Thanks..you Mr❤

your awesome dave

Nice one

You're so clever and smart🤩

Thanks a lot you're a savior 👍👍👍👍😁😁

maasyaalloh, what a helpful tutorial, always love your videos

when professor dave helps you get a better understanding of physics than your actual physics teacher

Profesor Dave, do you have any videos on rolling without slipping motion?

Hi @ProfessorDaveExplains I have a few questions about torque that I don't know if you already covered in this video, because to be honest, I didn't watch it all, but you are the only one on youtube making videos on this topic that replies. Here are my questions: 1. What absolutely decides whether rotation is clockwise and anti-clockwise? In a 3D spinning item, such as a bicycle wheel or even a ferris wheel like you said, has 2 sides. On one side, no matter how it spins, it will be clockwise, and the same wheel will appear to be anti-clockwise when viewed from the other side. 2. How does torque have a direction in or out of the page? I know the right hand rule RHR, but it doesn't explain anything. Taking the bicycle wheel or the ferris wheel as an example again, think about the axle: when looking at the wheel from the side so all you see is a thin rod, the axle sticks out on both the left and right, but when applying the RHR, and you pick a side, any side, your thumb will invariably end up pointing at either one of the left or the right... it's just a matter of which side you choose. Further, even if the sides don't matter for points 1 and 2 because the mathematical signs will reverse which ultimately end up cancelling, what does it mean when people say torque has a direction in or out of the page? If a spoke in the bicycle rotates as the wheel spins, it spins either clock or anti clockwise depending on how you look at it. The force applied to it is perpendicular to the spoke on the same 2D plane as that of the flat surface of the wheel. However, if you used the right hand rule, your thumb will point in either direction of the axle that sicks out. But that's not where the force is, you are not pushing on the wheel from the side (remember we are looking at the wheel from the side so we only see the thin profile of the wheel tread and no spokes). What is there? How can you say that "torque comes out or into the page/plane" when torque is the force you applied to it (eg to the spoke) to make it turn? Thank you in advance and sorry for the long question.

This man is getting me through med school. Thanks bro.

watching you from Pakistan Professor your lectures help me a lot keep doing it i appreciate your work

Wonderful

After seeing this video I subscribed 👌👌 explanation

thank you so much!! : ))

thanks

I love your work so much, but if you can extend your videos to go a bit slow while explaining, thanks for your patience

Many people wonder why radians do not appear when we have radians * meters. Here is an attempt at an explanation: Let s denote the length of an arc of a circle whose radius measures r. If the arc subtends an angle measuring β = n°, we can pose a rule of three: 360° _______ 2 • 𝜋 • r n° _______ s Then s = (n° / 360°) • 2 • 𝜋 • r If β = 180° (which means that n = 180), then s = (180° / 360°) • 2 • 𝜋 • r The units "degrees" cancel out and the result is s = (1 / 2) • 2 • 𝜋 • r that is, half of the circumference 2 • 𝜋 • r s = 𝜋 • r If the arc subtends an angle measuring β = θ rad, we can pose a rule of three: 2 • 𝜋 rad _______ 2 • 𝜋 • r θ rad _______ s Then s = (θ rad / 2 • 𝜋 rad) • 2 • 𝜋 • r If β = 𝜋 rad (which means that θ = 𝜋), then s = (𝜋 rad / 2 • 𝜋 rad) • 2 • 𝜋 • r The units "radians" cancel out and the result is s = (1 / 2) • 2 • 𝜋 • r that is, half of the circumference 2 • 𝜋 • r s = 𝜋 • r If we take the formula with the angles measured in radians, we can simplify s = (θ rad / 2 • 𝜋 rad) • 2 • 𝜋 • r s = θ • r where θ denotes the number of radians (it does not have the unit "rad"). θ = β / (1 rad) and θ is a dimensionless variable. However, many consider θ to denote the measure of the angle and for the example believe that θ = 𝜋 rad and radians * meter results in meters. Mathematics and Physics textbooks state that s = θ • r and then θ = s / r It seems that this formula leads to the error of believing that 1 rad = 1 m / m and that the radian is a dimensionless derived unit as it appears in the International System of Units (SI). In the formula s = θ • r the variable θ is a dimensionless variable, it is a number without units, it is the number of radians. When confusing what θ represents in the formula, some mistakes are made in Physics in the units of certain quantities, such as angular speed. My guess is that actually the angular speed ω is not measured in rad / s but in (rad / rad) / s = 1 / s = s^(-1).

Dave is my super hero

You are the best!!!

That transition at the end tho lol :)

there is a right hand rule for keeping track of positive or negative rotation that is much more robust and systematic than what he describes.

When the video start I was sleepy, but as you arrive at Torque I stood up. KEA LEBOGA.

I really understand u r explanation is well good

This video is awesome and easy!!

He is the best.

Hey, would't the lever that will move the earth be faster than the speed of light since it will transfer force faster than light? So it will mean that something can travel faster than light?

in your example the rod was horizontally placed , what if the rod was vertically placed ? then the force ( torque) will be perpendicular to the rod and consequently sine turns into cosine ??

me and my friend like your introduction song very much

sir the unit of torque is NM that is joules. so work, energy and torque are the same quantities?

Amaaaaaazing brooo 😍😍😍😍😍😍🤍😍🤍😍🤍😍😍🤍

U are amazing

Nice Tutorial, please how do I calculate this A circular disc stacked has a total mass 2kg and rotates at the center (bearings). Given that the diameter of the disc is 300mm, what amount of torque is required to make it rotate continuously at 10 revolutions per second.

You are amazing sir lots of love from india 🤞🤞💖

Your videos are very helpful.I am your student from India.keep uploading videos for physics as well as chemistry

Sir, please make videos on moment of inertia

My guess is that actually the angular speed ω is not measured in rad / s but in (rad / rad) / s = 1 / s. If we say that the measure β of the angle is θ radians, we mean β = θ rad, and θ is the number of radians (it does not have the unit "rad"). For emphasis we can say that θ is measured in rad / rad, since θ = β / (1 rad) and θ is a dimensionless variable. When we use mathematical formulas to obtain formulas in Physics, we have to know what the variables represent. What I consider a mistake, is present in the literature, it is not only in this video. Therefore, I will leave another comment with the detailed information to be examined.

I loooooooooove you man

we promote professor dave in our room lmao

Thank you made me understand this,but sometimes are too fast when explain other topics like momentum

Your birthday is in two days! Happy early birthday to our lord and savior!

2rsinc/t is it correct angular displacement c is angel

So professor Dave is a proof of "not all heroes wear capes"

Good.

Hi - do I deduce correctly from your introduction (at 0:57) that uniform circular motion is translational motion? I quickly looked it up and one source says uniform circular motion is not translational motion, but rather a special form of rotational motion. I'm a bit confused with the new term "translational motion" in the context of your introduction. Can you please offer some explanation?

I like the "TAU" you pronounce😃🤪

FYI: π is not pronounced as 'pie' in Greek, but more like a 'pe' instead. The same holds for the wave function in Quantum mechanics ie. 'pse' instead of 'psie'. Also, torque τ is read as 'taph' (or 'taf'') instead of 'tao' ('taou').

For rotational kinematics, can any SUVAT equations be used for questions involving angular velocity, or only the 3 equations listed in the video?

great

In the last question why net torque must be zero?

So if you have a disk of the same mass and you spin them so that they fly through the air, will be spinning disc fly further? Or less?

Hey why didnt you incorporate the sin of the angle between the weight force and the seesaw in the end example, or is it insignificant