Introduction to Torque

[AntoMelta]

I am very happy to see the vidoe after you give this Introduction to Torque

[willamricard]

I Love The Video It Can Increase My Knowledge Introduction to Torque

[imegatrone]

Steady I Really Like This Video Introduction to Torque

[Melehete]

Good, I like that you share this video Introduction to Torque , I wish success always

[NganaJHone]

Nice Video That You Share , So Very Nice Thanks You An introduction to torque

[Ondelendo]

I Really Like The Video From Your Introduction to Torque

[bundawartini]

Your Video Is Very Useful Sharing Introduction to Torque

[kroese1870]

3:57 Momentum

[kroese1870]

2:53 5 lazy people pushed dislike. ("Looks an awefull lot like WORK")

[kroese1870]

Watch 'Black Whole' - Nassim Haramein

[goldenbells12]

thank you so much for this lesson. after 2 weeks of winter break, I had lost all knowledge of physics. this video at least partially restored what I had forgotten. please continue making these wonderful videos :)

[adamaqmal]

nice share.

[TheRohBoat]

Is distance REALLY a vector?

[PcJaiden828]

@TheRohBoat displacement is a vector. distance is a scalar

[DaniFlo94]

Thumbs up if you tried to chase his mouse with yours lol

[luckysox23]

more than 240p kill you with too much knowledge

[Awesome99138]

does this mean that if a car has bigger tires or rims the torque will be better because it uses less force to spin?

[7AMoOoD7]

I love you ma !!!!

[behnamasid]

Torque is essentially work, because W = τθ

[snowman78619]

@behnamasid i think the best way to put it is that it is analogous to work

[avogadrois420]

I read this paragraph in my book and i can't understand it.Would u plz explain it for me? the axis of rotation can be chosen anywhere in the straight body where it is convenient for applying the torque equation.the most helpful axis of rotation is the one through which lines of action of several forces pass.

[DamiaanVDW]

um.. F x D is a moment?

[idiotkrati]

distance is not a vector man? distance is a scalar.

[mhelton20450]

you sure with the rotation?? may prof clockwise is positive ang C'clockwise is negative!

[spanishsteel]

@mhelton20450 nope Clockwise is NEGATIVE and Counterclockwise is POSITIVE read your text book.

[weixem]

@mhelton20450 That depends of the reference point my friend. Clockwise the torque goes into the screen, and in the opposite direction is going out of the screen.

[ashakumar1]

@mhelton20450 it doesn't matter . . because at the end, you end up with the same answer . . 

[Capreeca]

Determine the minimum force F that must be applied to the block of mass=50 kg such that the block of mass m=10 kg does not slide relative to the block of mass M. the coefficient of kinetic friction between all the surfaces is 0.2, and the coefficient of static friction between all surfaces is 0.3. The ramp in inclined at an angle of 30 degrees above the horizontal.

[therealjordiano]

9:00 makes me think of brain vs brawn :) the weaker guy has more brains, so he uses more leverage xD awesome video again

[ChaiPaaniNasto]

my mcat score thanks you. haha

[jnwmja]

Can you tell me how much torque i need to rotate 270lbs balanced with the distance vector exactly 1ft and i need it to move from point of force 8inches in 0.90seconds? Or do you already have a video to show me how to figure it out? 2,400vids is too much for me to search through. Thanks.

[FireBallAX1]

@jnwmja uh... I could be wrong here but. 270lb in kg is 122.47kg. 0.8in is 2.03cm. 2.03cm is 0.00203m and 2.03cm in 0.9 seconds makes acceleration = 0.0022556m/s/s . So (122.47x0.0022556)x 0.03048 (feet to metres) means you should need 0.0084199 Torque? This cant be right... According to this you should just use roughly one nine-thousandth of a torque (applied perpendicular to the weight) to do the trick. I'm a physics student and I cant do this right, god help me... Sorry I think this is wrong

[jnwmja]

@FireBallAX1 Well It's a start, and thank you very much. I'm not a physics student and I have no clue. Thanks for you're time.

[t3chfr33k]

thats a long meter stick

[ennraii]

"So this guy over here... " LOL

[ennraii]

THANK U SO MUCH. I have a physics test coming up, this helped alot.

[sweetcandyescape]

JKZ

[sweetcandyescape]

wait.

so torque is basically work?

because work is Force times Distance...?

[khajiit92]

work is in same direction as displacement, torque is perpendicular to direction of displacement. (from what i understand, i think sal is saying distance by mistake)

[ems7218]

I have an urge to eat paste!

[ScrantonicityRadio]

Your videos have taught me what a semester of college physics has not been able to! Thank you so much for these videos!

[1Jiller]

Can somebody explain in detail why a motorcycle performs a wheelie due to torque?

[rotflmaopmpqxyz]

On the last problem it wouldn't rotate but would it still accelerate upward because it has like a net force of 15 newtons on it?

[peterpang1994]

when we are considering torque , we often choose center of gravity as the center of moment. But would that be incorrect when we choose the other point as the center of the rotation. As an example, when a ruler is free falling, if I take the center of gravity as the center of rotation, the ruler will not rotate. If I choose the other points(other than the c.g.) the ruler will rotate.Then...will the ruler rotate or not? What are the rules of choosing which points as the center of rotation?

[crystalfieldyy]

hey isnt t=fxd supposed 2 b written in vector notation????f.d IS work,fxd is torque and it lies in the plane perpendicular 2 both f and d.....

[RachelWhitlock11]

Dude this was soooo helpful :D

[roxoroxoroxo]

my doubt is, what does torque really measure? I mean, in a practical way, what do we use it for. I don't mean in exercise solving, but actual day-to-day problems. by the way, thanks for all the videos, they've helped me a lot.

[HappyProletariat]

You don't need to worry about clockwise and counter clockwise being positive or negative. The first force is being applied at a 90 degree angle, and the second force is being applied at a 270 degree angle, and since T=Frsinθ, we can see that the 90 degree force is positive (sin90=1) and the 270 degree force is negative (sin270=-1).

[321boileranimal]

Well I guess I'll be throwing out my physics book now since it has no information in it.

[f50tube]

Is torque a measure of energy? Is power is energy over time?

[noahmurad]

i love you

[asiq1987]

nice

[khalilasbro]

why coudnt i have had you for a physics teacher....

[jonashtimothy]

u help me in my difcal now ur helping me in my physics.. men ur very kind..

how can i pay ur gratitude..

[blessthefate01]

THANK YOU VERY MUCH SIR. wish you were my physics professor

[necedm]

Cool demonstration... just fyi....

"moment" is a term used to describe and idealized force that is curved in a circle... However in real life of course there is no such thing as a "curved force" and moments are actually just forces acting about moment arms.. hence if you dont care about the actual force that creates the torque, sometimes you'll just hear "moment" instead... When talking about torque, your implying that the force and the moment arm are indeed important.

[z55z]

Thanks a lot ... your explaination is simple and clear ... thank you !

[monchikichiki]

THANK YOUUU! 

[AnimeIsAwsome14]

could you call it the radius instead of the distance because its rotating?

[way0to0go]

thank you very much (:

[drstingrae]

Kaplan say call it meters/Newton as to not confuse this with Work or Impulse as in Joules which is Newton/meters

[Legionnaire18]

@drstingrae To be honest...fuck Kaplan. Go for The Berkeley Review. Seriously. They're *wonderful*. Kaplan was a TERRIBLE program.

[188rabia]

thanks!

[xEllykinzorsopz]

THANK YOU 5/5 =DDD

[saadnizamani]

torque is also called "moment of a force"

its unit is NEWTON METRE (Nm). or joule

[freezingbeast]

@saadnizamani

i believe the joules is reserved for work, and Netwon meters is typically used to designate torque.

The unites (while technically equal) are not often switched so you can distinguish torque vs work

[onlyAerik]

"now you may say 'sal, that looks an awful lot like work." well it's important to know this isn't work, so we won't call this joules"

[sharikokaine176]

@saadnizamani does "the moment of a force" sound like a form of energy to you?

[cpgnition]

Very helpful. Thank you.

[szebdeh2009]

thankyou

[wexarexthexStorm]

the 10m looks like a hand ;D

[dazza2708]

We call torque a "moment" .

[purppp]

LOL 5:45

[wexarexthexStorm]

lol

[jpp7233]

What programe aye you using for the animations?

Thanks

[8bit2008]

I think it's just Microsoft Paint with a black background, rofl

[niggasinmaface]

@8bit2008 its not.

[JesusisMyGrandson]

@8bit2008 lollylops

[wexarexthexStorm]

MS Paint

[fahadkiram]

i didn't understand what your saying....

coz i'm so weak in numbers... i always got zero in exam...

can u taech me?

[kickanemo]

What if I have two discs of different radii? One respectively smaller than the other, and a string is attached to connect them like the sprockets of a bicycle. Would the torque on the larger disc be the same as the torque on the smaller one since torque is transferred from the smaller disc to the larger one bcoz of the string or differen? Please Help and thanks in advance.

Good videos!

[kickanemo]

What If I have to disks of two different

[zephyr89s]

if you were my physics prof. I would kiss your feet.

[drevilpolo7]

I seriously think the colors help me from zoning out..it's like light bright on steroids....and they really help distinguish different concepts.

[lospapi8]

Thank you thank you thank you thank you thank you

[xlwaiyiplx]

u r welcome

[jtlangel]

U R A GOD....thanks for the video

[21beal21]

wow. i love physics, and u make it fun! if u teach tell me where and ill go to ur class! hahha excellent job. very clear and understandable

[jayguy173]

your hand puts 10 tqs on a 10 foot wrench that wont turn the bolt as fast or easily as a 20 foot wrench using same 10 torques from same hand

[fatima1342]

Good video, very clear explanation.

[idricool]

Isn't force times distance equals work ?

[JiGsAwMoFo]

Yes, but if you noticed he states that work is fundamentally different than torque because for an object to do work the force must be parallel to the displacement. Whereas with torque, the force is perpendicular to the lever (moment) arm.

[imgregvideos]

Oh my god you are amazing! My physics teacher is horrible at explaining things. Why can't more physics teachers be like you?!? Thank you so much for providing this excellent lecture!

[mhghofrani]

I am confused , I was told that the torque is perpendicular to the arm and the force.

please help me

[danieldraco2000]

is distance a vector?

[khanacademy]

Yes. Distance is specified by a magnitude and direction.

[xzxz619]

Where does displacement come in?

[jayguy173]

more cylenders and larger displacment engines make more torque so for same rpm they creat more horsepower

[arshbassi9]

@khanacademy

Distance is a scalar quantity....It has just magnitude....Displacement is a vector quantity....

[mfrekerara]

@khanacademy

Isn't distance a scalar quantity and displacement is vector?

[shutupsuckling]

@khanacademy I thought distance was a scalar, and displacement was a vector.

[grim107]

@khanacademy If you really want to get semantical, distance is a scalar and displacement is a vector. The distance between two points can change depending on the path one takes, whereas the displacement is unchanging.

Distance is to displacement as speed is to velocity:

Speed = distance / time

Velocity = displacement / time

At least that's the way I learned it...

[janoxbes]

@khanacademy

no distance is not a vector. It is a Scalar Quantity because it doesn't tell you the direction its going in, it just tells you the distance the object moved.

[imgingi]

@khanacademy NO IT'S NOT !!!!

[nvdp999]

@khanacademy No. Since Direction is not associated with the distance covered, it is a scalar. Displacement is a vector quantity.

[MrBioNerd]

@khanacademy Nope direction is a scalar quantity, displacement is a vector quantity!

[tantalides]

@MrBioNerd you mean distance is a scalar quantity?

[1mj2288]

@tantalides distance is a scalar quantity.

Displacement is a vector since it involves direction already like 5km due north.

Distance involves only direction like 5m, thus a scalar quantity.

[mekuf]

@khanacademy you mean displacement, distance is a scalar.

[krazzyKooldownKrew84]

@khanacademy Distance is a scalar quantity. Displacement is a vector, as you stated "distance vector" then it has a direction so your right in that way.

[umeirdestination]

@khanacademy i thought displacement is a vector, n distance is scalar....

[8JSimo]

@khanacademy Isn't that displacement? I always thought distance was scalar....

[peterpang1994]

@khanacademy If distance with direction , that would be displacement??

[rshrott]

@khanacademy i thought only displacement was a vector and not distance

[Pup3tm45t3r]

@khanacademy Actually, Distance is a scalar quantity. Displacement is a vector

[EvilFatCat]

@khanacademy Sal, I am pretty sure distance is NOT a vector....It has no direction.... DISPLACEMENT is a vector, not distance

[adamska4]

@EvilFatCat

That would be correct...

[daproblogger]

@khanacademy Distance is a scalar... Displacement is a vector.

[babbu258]

@khanacademy But sir I have studied that Displacement is Vector Quantity & Distance is scaler quantity..

even in NCERT BOOK...



[archiemedes42]

@khanacademy Displacement is specified by a magnitude and direction. Distance is only specified by a magnitude (and so is always positive). So, it is not a vector.

[bathunter14]

@khanacademy Distance is a Scalar Quantity, as it only has magnitude where as it is displacement which is a vector quantity, having both magnitude and direction.

[Balajimt]

@khanacademy i thought displacement was a vector and distance is scalar!!!!!!!!! well i do not know better than SAL because i am just a ninth grader !!!!

[fwesh1]

@khanacademy actually I believe distance is a scalar. Displacement is a vector.

[RSign321]

@khanacademy Isnt that displacement?

[lewiscmbrit]

@khanacademy Isn't displacement a vector and distance is the scalar quantity?

[quickshotspartan]

@danieldraco2000 no, distance is not a vector. distance is the measurement of how much or how far an object has traveled. its a summation of the objects linear motion. magnitude only

displacement is a vector, it shows the distance between start and end and relates with a direction. magnitude and direction.

distance (scalar) displacement (vector)

just like the other counter parts

speed (scalar) velocity (vector)