Why direction of angular velocity is perpendicular to plane of rotation?
Vložit
- čas přidán 30. 01. 2021
- This is an interesting concept. Direction of angular velocity is taken as perpendicular to plane of rotation i.e. along axis of rotation. It has physical significance and I have discussed it in this video. This video will make the concept saral for all students.
Follow this channel on Telegram
t.me/saral_physics_by_anshul_...
Follow this channel on Facebook
/ saral-physics-by-anshu...
Follow me on Unacademy
unacademy.com/@anshulsharma1690
You can suggest a topic/concept/confusion related to any topic in the comments section. I will make a very simple explanation video on that.
Pehli baar youtube pe video mila hai jiski vajah se mera directions ka concept clear hua hai , nahi to har log youtube pe sirf right hand thumb rule k baare mai bata dete hai . Koi ye nahi bata raha ki jab motion plane mai ho raha hai to direction perpendicular to the plane kaise aa sakti hai. Thank u sir u clear my doubt .
Bhaiii.... Me ye question online dhund dhund kar thag gai thi ish direction ke bareme... Ki ye axis ke upar kaise depend he direction.... Aakhir kar mil gaya ek video... Jinone bataya... Thankyou so much sir😌😌😌.... Sab bas ye bata rahe the ki... Direction kaise nikalna he... Par q nikalna he... Ye koi bata rahi nahi tha...
Sir ji yehi to lekar mai 2 mahine se presaan hun😭😭, CZcams par aj tak apka hi ek video mila hai bas.
Same bhai 😕😕
Me too
Sir Aap jaise teacher ki bohot jarurath he... Please aap ye continue rakhna... Aap bohot acha practically explain kartey ho... Thankyou so much 😍😍😍😍
Finally my doubt got cleared!!
Thanks a lot, I was so confused about this for like almost 6 months, no matter where i checked none of the answers really helped, finally it got clear, thanks sir
Really it's fantastic explanation,, I'm now take classes from pw app, they even don't explore in this form
GREAT JOB SIR JI🙏🙏
Sir , u Explained it in saral way
Thank you for ur great explanation 🙏🙏🙏
Vary informative
Fabulous...thanks
Great explanation of concept guru jii 👌👌🙏🙏
Well explained sir
Keep watching
Sir thankyou for explaining this concept .🥰🥰🥰
🙏 thank you sir
Thanks sir
Thank you sir for the deep insight
Ekdam clear ho gya
Thankkk youuuu sooo much sir I was stuck with this question in my head now everything is clear and fine!!!
Great explanation sir👍
tq sir
Sir really really thanks because i am in confusion why we have to take axial direction even though particle moving in circular direction .now it is cleared i am happy .sir please start videos on full chapter which are helpful for jee mains and advance.😊
Well explained sir 🙏🙏👌👌👌
Thank you sir mein ye soch kar pareshaan tha ki agar object ghum raha hai to uski direction velocity ke direction ke similar hona chahiye
Thanks sir a lot
Sir mere dimmag sae parkash nikal raha hae😇😇 thank you
Good!
Really really helpful ♥️♥️
Thank u sir❤️
Well explained.
Sir alot if thanks to you
Thank u so much bro..
Excellent explanation
Thank you sir
Theory padhte padhte ye question aaya
And you explained it very well.
Good job
Thank u sir
Thanku sir . To clear my doubt
Always welcome
Very very thank u....i was searching for this doubt....u solved it❤
sir that is pure dedication and determination towards your work. Sir you need some more recognition . You are deserving. I have been watching your videos for quite some time and I find the topic really easy to understand. And now I will definitely recommend your channel to my other classmates , I hope they find it amazing. You are the Real Hero everyone needs and to be inspired of. 🙇♂️🙇♂️" thnxx for making this type of amazing content for us .. all concept clear in saral way .. 🙏🙏🙏🙏thnxx for making this vdo sir .. u r legend . sir ..🙏🙏🙂🙂🙂🥰❤
Thanks for such big appreciation vishal!
@@shiksha4157 its my plesure sir .. apke samne to ye kuch bhi nhi hai ..
thank you so much
Thanks for introducing me with a new prespective !! :D
So simple
Great sir
Thankyu so much sir....i dont have words to say how much important this topic was for me...❤❤you are a real physicist...sir aisi hi videos bnate rhna ..jyada views aaye ya na aaye but sir jo log practical physics sikhna chahte h unke liye aap bahut achhe teacher ho....
thankyou very very much sir
really helped me a lot
Best explain sir
No words 4 dedication..... Sukriya SIR jiii🙏🙏
Sir we need lectures like this please start videos on chapter which provides deep knowledge to us
Please also make a video on Angular acceleration direction
Sir I want to know that , if direction of angular acceleration is constant in magnitude,but always perpendicular to direction of w , it will always change only the direction of w and never it's magnitude thereby continuously changing the plan of rotation.
I have thought this many times but I didn't get answer, so thank a lot for this video but again it doesn't make sense we have just compromise
Not explained yet ?
May be
Sir nice explanation. Sir do tell why we take only right hand thumb rule only.
Finally ❤
Sir please relate it with some general life phenomena....
Sir can you pls make the video that when we close the door then why the torque act's perpendicular to plane it should act on the direction of rotation in rotational motion pls sir 🙏
Thanks a lot sir , our couching teacher wasn't able to explain
I always wonders,but didn't find answer until now ,thank sir
sir what about angular acceleration??plz explain
A very good morning / afternoon / evening sir ..i m a class 10th student and i want to know why had you left making further video with a such good explanation on small small but very imp concepts .
WONDERFUL EXPLANATION!
but i have a doubt
If we mark a point on a disc and then rotate the disc about an axis passing through its center then after one rotation will the value of angular displacement be zero? since displacement depends on initial and final points , if they become same then won't it be zero? some sources say that it will be 2 pi radians
We need to see it in the sense of rotation, hence 2pie.
Sir can u plz explain centre of mass imbalance case plz
Sir can u please tell if direction of angular velocity is upward then why does the object do not move upward ( in direction of angular velocity)
Please reply 🙏🏿
The actual direction of motion of every particle of the body in rotational motion is different i.e. tangential. But the perpendicular direction is the only common direction for all.
Why we make tangent for linear velocity
It is the only way in which we can tell about the direction of velocity at that particular instant.
Sir you got a new subscriber ❤. My doubt is cleared
Feel agaya
Does that mean if we put an object performing UCM in space (vacuum) , it is going to move in the direction perpendicular to the plane in which it is moving???
THAT DOESN'T MAKE SENSE!!!
Sir for centripetal acceleration we can derivate it by taking magnitude of velocity constant but how even the velocity is variable by its magnitude its centripetal acceleration remains v2/r?????
Centripetal acceleration is also variable because it’s direction is changing at every point. To understand this, draw a circle and mark different points on it. From each point draw radius and it’s direction towards the centre. There you observe the direction of centripetal acceleration at that point. It is different at every point.
Thanks sir... Dc pandey 10.3 example nhi samajh aa aarha tha ..... But now no daught.... 👍✍️
Sir ...What is the direction of Angular momentum ? Is it always in the direction of Angular velocity or may / may not be in the direction of Angular velocity ? Please reply 🙏
Concept is same. Direction is perpendicular to plane of rotation.
Perpendicular to plane containing linear momentum vector and radius vector.
Imagine getting heart and reply from sir ❤🌻
Sir but we know that V chages at every point but according to the formula when the magnitude and direction of R are keep constant then the V should not change. How us it possible sir?
Magnitude of v may not change but direction of v always changes.
@@shiksha4157 oh ok sir got it, i by mistake thought that the direction or R doesn't change. Thank you sir now very thing is clear! ❤
Is there any movement of particles along axial dir....u are saying that all particles have a common direction that is perpendicular to the plane of rotation....but why should we take that direction as ....dir. of angular vel......is rate of change of angular displacement along along the axis?
No other common direction possible.
Physically, we can say if direction is axially up then particles are moving clockwise and vice versa.
1st view....1st like👍😂😂
Sir.. ur explaination is just amazing. My concept is clear now But ; how we know that the velocity is same for all the particles. I m too much confused.. plz clear it🙏🙏
V=radius of rotation*angular velocity
Sir
If angular velocity is
angular displacement / time
And displacement cannot be more than 2pi why in questions angular velocity is more than 2pi rad/ sec?
In one second, if it makes more than one revolution then angular vel becomes more than 2pie rad per sec.
@@shiksha4157 that means we are technically counting angular distance
Hum to directly bhi bol sakte he ki direction ya to clockwise he ya phir anti-clockwise. To fir along the axis kyun??
Every particle has different direction i.e. along tangent at any given instant. Perpendicular direction is common for every particle.
Who told you that all angular velocity vectors must have same direction ?
Matlab jo man me aaya voh bol diye
How will you explain direction of angular velocity?
@@shiksha4157 just tell me that why all angular velocities should have same direction . Give reason for that claim
@@shiksha4157 that's the purpose for what the video should've been made but asking me this is not a great ideA
Why angular velocity is a constant quantity
Just like linear velocity, angular velocity can be constant or variable.
Sir para apa konsa perpendicular ki baat kar raha ho kyuki line nicha bhi particle se khicha toh bhi perpendicular hoga and so angular vel. Nicha fall karegi
Perpendicular up or down is decided by a sense of rotation.
@@shiksha4157 ok but still what that perpendicular represents?
Common direction of all particles doing rotation.
Sir anticlock me moving particle ka perpendicular ap niche v le skte the fir upar hi kyu liye.? Help
Thumb of right hand tells the direction!!
@@shiksha4157 sir wo to thik hai. Lekin moving particle pe jo ap perpendicular upward hi kyu liya downward kyu nhi.
Use Right Hand Thumb Rule. Thumb goes up in anti clockwise rotation and down in clockwise rotation.
That was The That I wanted , but w ka koi physical significance nhi hai 😢
I love physics but i don't know how to understand the concepts clearly .I watch some videos but there are some questions which comes to my mind about that concepts .when it remain as a doubt i loose interest
Sir angular velocity ki direction ek hi kyun nahi man li gai ,sirf upar ki wor a niche kyun mani gai hai?🤔
Bcz yahi ek aisi direction hai jo sbhi ghoomte hue points k liye common hai
@@shiksha4157 lekin sar jab clock wise ghumta hai to phir direction niche kyun ho jata hai
Clock aur anti clock me do ka directions uppar ki wor hi kyun nahi mana gaya sir ji
Clockwise rotation mei upward hogi direction
Anticlockwise mei downward
Pr upward ho ya downward hai toh plane of rotation k perpendicular hi
sir perpendicular means 90 degree angle???
Yes
But what is the logic behind making its direction perpendicular?
It is the only common direction for all particles at any instant of their motion. If we need to specify direction then perpendicular direction is the only choice.
Sir acceleration ki defination he ki change in velocity per unit time.....lekin agar koi body uniform motion me rotate ho rahi he....to acceleration zero ho jayega n sir q ki innitial and final dono velocity Same he to...plzz sir video banayiye n
Uniform motion jo ap bol rhe ho usme magnitude of velocity will remain same. Direction keeps changing hence vel is changing so it is accelerated motion.
@@shiksha4157 yes sir accelerated motion to he vo....samaz gaya...but acceleration zero q nahi ata....jabki final and innitial both velocity are same...
Vector subtraction is not like normal subtraction. Your mistake is u r doing v2-v1=0 but v2 and v1 are vectors. Both have different directions.
Sir the real direction of angular velocity is upward or circular?
Plz bta do sir
Upward or downward i.e. perpendicular to the plane of rotation
@shiksha4157 sir vo kya circular hi ghumegi
It moves in a circular direction but we cannot assign the direction of angular velocity along the circle because at every point on the circle, the direction changes. Only perpendicular direction is common to all points.
Upwards or downward which means perpendicular to the plane of the circle.
@@shiksha4157 thank you sir
How you take a perpendicular?Where is it come from.
It is a common direction for all particles!
@@shiksha4157 Any evidence/reason?
When someone ask u...what is the direction of angular velocity then u cannot ans it has many directions...it is not logical...so we chose perpendicular because it is common for all particles!
@@shiksha4157 No sir physics is all about some solid reasons , And sir I shall tell you about that reason for which angular velocity has direction along the axis of rotation is that think about Right hand rule...If we put our's wrists on centre in a way that thumb is along the axis of rotation and open the fingers outward along the radius and twist along the tangent of the particle at that point of circle.If we do so then we can say that it has direction along axis of rotation because it is sure that particle will leave the circle along the tanget...if that's not so.. then sir it has some other solid reason please explore about that.....
Sir angular momentum ki direction kya hoti h
Angular velocity ki direction k parallel hi hoti h kya sir
Same direction as that of angular velocity.
You deserve 1m subscribers sir,
Love from pakistan❤
Thank you!
If your title and thumbnail are in English (albeit grammatically incorrect), one might expect the video to be in English, too...
Doubt tha isliye toh aye , doubt hi sunaya 4 minute phir solution diya
It has been explained in the video. Perpendicular direction is the one and only common direction for all particles. Hence it is taken to be in the direction of angular velocity.
Sir agar clockwise hgi tb
Tb bhi perpendicular hi aega but in opposite direction.
@@shiksha4157 bht shukriya respected Sir
Sir pls reply me kyo hm perpendicular direction le , sir mana ke aisa sabhi pints ka direction alag hai aur perpendicular lene se same ho jaata hai but sir iska use sir bataie aur sir hm aise kaise le sakte hai perpendicular sirf direction same dikhane ke kiye, sir pls tell me
When someone ask u...what is the direction of angular velocity then u cannot ans it has many directions...it is not logical...so we chose perpendicular because it is common for all particles!
@@shiksha4157 ok sir i got it. Thanks for giving me your precious time 🕒
Sir I hope you are reading this. Thanks for the video sir. I watched the video, but my questions are -
1) Angles covered by points A, B, C (in a given time) are same. But why should their directions be the same? According to what rule/ logic they should all have same direction??
2) Even if all of them have same direction, how can we human beings decide the direction? ?
Please answer Sir.
Velocity is always defined in a particular direction.
Yeah same thing i am also looking for,If u know the ans please reply
@@mudavathharshavardhan827 If you know Hindi, click this for answer. The explanation is about Torque, but it answers our question also czcams.com/video/mi0RrGWV2CQ/video.html
Anshul Sir, this is the right explanation 👆
I also have same question . How can you say that angular velocity vector is same for all direction ? I could believe you once if you said angular speed , but angular velocity being a vector must have different directions at different positionna
Are u from saksham?
What is ur name?
@@shiksha4157 Phalit from pkr jain vatika
sir sochte gaye, sochte gaye to fir uske baad perpendicular direction hi kyu di, aur koi direction kyu nahi ??
Because there is no other direction apart from perpendicular direction which is common for all particles at every instant.
@@shiksha4157 but how direction is perpendicular for each particle....particle was moving along the tangent (in circular motion) only
Watch the video again. It has been explained in the video.
Sir Axis hi kun ye nahi sochate to aapke video pr aate hi nahi.
The answer has been explained in the video.
I am from allen and they didn't explained this.
Same
Same wo sir bole ki clock aise ghum rhi hai to angular velocity andar ki taraf he
To mujhe yahi doubt aaya tha
Lekin perpendicular direction me force hi apply nahi kiya to us perpendicular direction me moment kaise gaya. Common batane ke liye perpendicular kiya ye kitna illogical he. Real life me aisa thodehi hota he !
No translation is there along the perpendicular direction. Axis of rotation is specified through this perpendicular direction.
How angular velocity is same for different positions ?
You can say angular speed may be same . But not angular velocity . So whole explanation is wrong .
Bro, linear velocity is changing as tangent is different for different point thus because of direction linear velocity is changing don't confuse it by angular velocity...in angular velocity we get direction by right hand rule or screw rule. The direction we get here is perpendicular to plane of rotation,as you can see in 8:18 perpendicular drawn gives same direction for every point. Thus velocity is same you can also feel it... we know angular velocity is change in angle per unit time.Now in an instance say T every point in disk will rotate same angle it cant be that some rotate 5 deg and other 3 deg at same time otherwise distance between them will change.. i hope you get my point
@@sugamnema9103 angular displacement is vector .
For rates of change of different angles angles (angular displacement vector ) , we get different angular velocities .
You guys are just rote learner and conceptless .
This is a wrong explanation, check other videos
What is wrong in this explanation?
Poor logic.
How?