Angular Displacement ki direction b along axis of rotation perpendicular to plane hoti hai lakin kyu sir? please clear my doubt

Same bhai 😕😕

Me too

Keep watching

Good!

Thanks for such big appreciation vishal!

@@shiksha4157 its my plesure sir .. apke samne to ye kuch bhi nhi hai ..

Always welcome

Not explained yet ?

May be

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.

Concept is same. Direction is perpendicular to plane of rotation.

Perpendicular to plane containing linear momentum vector and radius vector.

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.

We need to see it in the sense of rotation, hence 2pie.

It is the only way in which we can tell about the direction of velocity at that particular instant.

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! ❤

No other common direction possible. Physically, we can say if direction is axially up then particles are moving clockwise and vice versa.

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.

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

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.

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

V=radius of rotation*angular velocity

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.

Thank you!

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

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.

Just like linear velocity, angular velocity can be constant or variable.

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 🕒

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.....

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

Yes

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.

Angular velocity ki direction k parallel hi hoti h kya sir

Same direction as that of angular velocity.

Tb bhi perpendicular hi aega but in opposite direction.

@@shiksha4157 bht shukriya respected 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 kzfaq.info/get/bejne/o89ghdV4vLyWc4U.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

The answer has been explained in the video.

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.

Same

Same wo sir bole ki clock aise ghum rhi hai to angular velocity andar ki taraf he To mujhe yahi doubt aaya tha

What is ur name?

@@shiksha4157 Phalit from pkr jain vatika

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 .

No translation is there along the perpendicular direction. Axis of rotation is specified through this perpendicular direction.

How?