foreign really excited and happy to see all of you back again in the chapter now I will cover it fully in probably four to five lectures you can become better okay so Shall We Begin everybody ready so happy to see the energy of you guys in the channel for us that's a big thing motivation so don't forget to subscribe um that is I wrote and I was one of the state Toppers in Tamil Nadu Jai advance so let's get started people like I said if you are new to the channel don't forget to subscribe and if you're already a loyal member you know what to do and the like button we will get started okay are you all ready law levels with this you will understand neat and J Basics but you have to solve plenty of questions to become a Topper this is not enough got it I hope I made it very clear now let's get started kinematics so kinematics now it deals with the study of motion without researching too much about how it started Matrix foreign does that make sense to everybody is this an easy chapter or not this is a dubakur chapter this is nothing it's absolutely nothing you can literally have a cakewalk with me and I will prove it to you you will understand it by the end of fourth lecture in the chapter okay so let's get started motion foreign I want to know the answers from you guys it will go until 9 30. lecture so at least till 9 30 maybe maybe 9 45 1 hour 45 minutes in the lecture ncid solution because this is a slightly big lecture I need my thundai Elena halfway it will break down okay circular motion sir linear motion sir rotational motion sir periodic motion sir Vara level yeah very Innovative answer you have you know circular motion you have rectilinear motion foreign said is very good the easiest to study is linear motion that is motion in a straight line do you all agree number complicated emotions this is motion in a straight line rectilinear motion rectilinear motion Direction side left right now foreign there is a wall beneath my leg above my head and on my side also so another side I can only go straight or I can come back Motion in straight line Motion in One Direction do you all understand what I am trying to say foreign foreign hello are you all clear everybody so One Direction that is called rectilinean motion linear motion or Motion in a straight line did you understand the chapter name Ebola yes very good let's go yes problems so either example of rectilinear motion killing left to right in polar where oh straight up motion or Motion in a straight line it's also called as linear motion it is also called as linear motion are you all clear so shall we proceed very good so what is motion what what is motion assumptions you are gonna break down so I will help you don't worry so what is motion motion movement sir moving body sir movement of object sir yes yes yes I'm I'm getting it I'm getting it from you guys but what is the exact definition I want one important word very good somebody somebody said that is you are absolutely right motion now there is one important word I am looking for sukuti is absolutely right great rapid rajit very good rajit exactly very gaming so answer is the position of an object should change Whenever there is a change in position or orientation orientation we are worrying about Motion in a straight line so now so let's talk about position only orientation let's not get into that we will study when I teach you rotational mechanics so rotational mechanics then you say motion is there correct very good Anu Anuja very good very good brilliant in the picture in the picture is there a motion or not is there any motion going on in this picture this picture is stationary Legends it is foreign So when you say motion the position should change in a picture the position was not changing guys that is rest there is no motion there but here because it's a video you say the position is changing and therefore there is motion present here or definition it is at rest are you all clear very good level yeah when I'm teaching you physics or chemistry I will always give you questions I will teach along with questions I will go at a very normal speed because I want everybody to understand you can watch the replay but I want to ensure that I touch upon every single Concept in the book okay so rectilinear motion is also called as single dimensional motion one dimensional motion correct two dimensional motion on the other chapter Motion in a plane so two dimensions very simple example rectilinear or a dimensional dimension right two Dimension either way three dimensions so understand this in the visualization of Rumba important Direction foreign other examples are bored in the Whiteboard is a plane this is a plane plane is a two dimensional shape so in the white Ballo either on the 2D motion number real life three dinner numbers 3D movies foreign so 1D 2D 3D are the moon I hope all of you are clear okay one dimension foreign as a 3D so if I come outside the screen okay if I come outside the screen that is called 3D this is one D in the Vidya so please okay fourth dimensions the fourth dimension higher Dimensions law Newton has studied and he has written books on that okay in some books they say time is the fourth dimension so who are all interested in those astrophysics and astronomy you should probably look into all these Dimension and all that so I don't know much about 4D and all that but Newton studied he has written a book on that okay so yeah let's move forward passing love so in the gallery just by looking at an object can we say whether it is in motion or not either motion is can you all please let me know my dear boys and girls quick quick quick yes sir answer true sir everybody is saying true answer is false yes sir updates foreign just by looking you cannot see and tell okay so motion is always relative please understand that motion is always relative so Observer foreign so motion will depend on what is your reference so there is no absolute motion or absolute rest which you can Define you have to first quote what is your Observer what is your frame of reference got it superb I hope all of you are clear so easy in our example coming tomorrow animation yeah everybody superb that's the spirit guys Anna it is actually in a laptop on a moving chair either parking reports just by looking at an object you cannot tell whether it is moving or whether it is it is at rest unless you fix the reference point Master wire level example did you all enjoy it amazing right where a level this GIF is I really liked it good good I'm glad you guys are able to understand where reference okay so friends foreign foreign foreign you cannot you know Define clearly whether an object is moving and whether an object is at this position so reference point another a point assumed to be at rest and used to define the position of an object so in the point line there now object position Define reference point it is usually assumed to be at rest per singular as was great so that is what is the reference point here you should not number reference point okay so shall we get started super great so now next one is frame of reference Concepts important I want you to be very good at Concepts yeah that is what will help you clear exams you want to get 95 above and you want to do well in neat and Je right so that's why you need to understand all of this so frame of reference a frame of reference okay so frame of reference for example for example is a frame of reference like this is foreign this is what I will see Masa foreign foreign got it this is very important I hope you all liked it frame of reference Laws of Motion we will study inertial frame non-inertial frame Allah so Laws of Motion we will study inertial frame non-inertial frame Allah concept I will teach you extra stuff but wait for that okay so let's go forward can you all please check this question Earth is not moving with respect to any Observer residing on Earth or residing in outer space obvious or false in our Earth so Earth is not moving for an observer outside I am going to Mars Elon Musk SpaceX Earth will be moving so with respect to my my frame with respect to my observation it is moving but with respect to somebody in Earth it will be stationary got it so it depends on the Observer so respect to any Observer no no no no not with respect to any Observer maybe with respect to somebody on Earth so motion is relative so how can we say for sure whether the object is in motion or rest okay it is true that there is nothing called as absolute motion and we should always be asking for in the frame of references so shall we move forward everybody clear Superba yes yes yes we will go fast guys we can go quickly so try to answer this come on guys everybody please try to answer this question If X and Y are sitting in the same fast moving car If X and Y are sitting in the same fast moving car then what is the answer can you please let me know quickly so XO yo the answer is what is the answer everybody please let me know answer is option a very good so option is you guys are absolutely awesome option C tapupa options see X and Y random pair rendup foreign so that is what I wanted is superva I hope all of you understood so now we will look at distance and displacement is calculating everything whatever you traveled is called distance okay and displacement distance it is the shortest distance between starting and ending point are you all clear so either starting point ending point B okay foreign can you guys think about it everybody quick quick quick top it up and think funny how do you go to school sad school school um okay so this is this is called so the total path length is called distance the total path length is called distance displacement so displacement is the shortest distance between your final point and the initial Point okay so displacement now initial to final shortest point so the line the line joining initial to final point that length is your displacement are you all clear everybody happy with this so distance now it will be the entire path length displacement now it will be direct final minus initial portion okay very good everybody happy with this then we'll proceed quick quick quick yes very good in the example distance everybody very good so always remember always remember distance is always greater than equal to displacement Masa foreign so there is a very important word please note this down there is a very important line displacement does not depend on path sorry yeah displacement on there it just depends on foreign did you all like it are you all clear very good so yeah with that we'll move forward passing law so distance is a scale R displacement is a vector okay scale only magnitude I don't care about the direction whereas displacement now it's a vector so I I care about the direction in the discipline so Vector means you have magnitude as well as Direction whereas your distance which is a scalar quality has only magnitude okay please be quick my dear boys and girls I want you all to be fast magnitude now value either a value YOLO and the number sanjana is and the five kilometer is the magnitude distance so it starts from home goes to SpongeBob 80 kilometer minions distance so eight plus three eleven so eleven the answer displacement displacement foreign displacement Divya super Divya paritosh very good and many of you have got it right displacement yet final question so initial here final here upper displacement distance so in the distance displacement so either in the distance so displacement is five kilometers did you like it did everybody understand everybody understood this easier passing law so either initial initial either final so initial finals displacement displacement exit another so we know that XA plus Moon is five kilometers that is the displacement I hope you guys have understood it everybody good job people I am super duper proud of you all so important I want you all to be very very fast then we shall proceed a particle goes from x equal to 1 to x equal to 5 what will be its displacement answer is displacement in a formula displacement formula on the final position minus initial portion final portion is so final minus initial is nanometer so final minus initial is null emitter that is your displacement did you all like it are you all happy so shall I move forward now everybody superb that's brilliant my dear boys and girls great job is will become very fast I will assure you of that okay final minus initials that is how you do it okay so can you do this question everybody what is the answer is it a b or c what is the answer for this question relationship between position and displacement just now I thought you it is final minus initial so what will be the correct answer very good Trinity what is your doubt Tamil gamer sanjana great job you guys are absolutely amazing so displacement is x minus x i is my displacement you guys are on the dot right foreign convention signed convention and a displacement is a vector character so Vector Direction so in the directions foreign so to know whether you move forward or backward even though it's a motion in straight line you need you need sign convention okay to specify the direction are you all clear so um right side positive left side negative numbers your intuition is I hope all of you are clear just like your graph x axis positive x axis is negative Y axis positive Y axis negative okay so this is true yes are you all sure this is absolutely true or false let me know my dear boys and girls see girls what is this guys come on be fast I want you guys to be quick what is the answer the answer is true yes distance on the total path length so the total path length will definitely be more than the displacement right like everybody knows that that's that's a no-brainer the total path link will obviously be greater than the displacement if you are moving in a chaotic manner if you are moving along a straight line maybe both of them will be equal distance can be zero or positive whereas displacement can be positive negative zero foreign did you like it distance can be zero or positive distance negative distance the scalar distance negative distance cannot be negative it can be zero when you are at rest it can be positive if you are moving got it but displacement can be negative can be zero can be positive got it I hope you understood it so yeah let's go forward everybody please let me know what is the answer for this question G1 vector magnitude any physical quantity which has both magnitude as well as Direction you call it a vector okay foreign foreign foreign are the same then displacement is also zero so distance 0 displacement distance zero ah displacement zero now you see if the displacement is 0 does that mean distance traveled is 0 can you guys think an answer very good the answer is may or may not yeah displacement zero now now displacement is foreign did you like it foreign displacement 0 now I can sit at home also this is also displacement zero here distance is also zero so displacement zero now distance may not be zero distance may be zero we cannot tell for sure foreign next question people please try to solve it everybody quick quick quick what is the answer the displacement of a body may be zero when distance traveled by it is not zero is assertion correct is assertion true everybody is the assertion true or false is the assertion true or false the assertion is the assertion is what very good krishnamini assertion is true in our distance traveled zero elated displacement zero is so yes assertion is true it is correct the displacement is longest distance between initial and Final displacement is shortest distance not longest so long shortest I hope you guys liked it so shall we move forward very good are the topic forama speed and velocity speed and velocity terms foreign that's when you will grow don't let it go don't settle for less push yourself solve some 20 questions you will become better okay very good first average period of formula another and average velocity it is a scalar very good foreign velocity is the vector first point did you all like it so velocity solar power Direction so no velocity solder directions will know speed Soldier values other speed foreign foreign foreign time average speed killer average velocity on the velocity displacement velocity on the displacement speed on that distance speed now distance speed not distance scale R scalar vector vector velocity not displacement okay same IPO now so number foreign what is my average speed what is my average velocity nah Witnesses so what is my average speed and what is my average velocity very good sweet gaming you are absolutely right you are absolutely right very good vigneshwaran so passing law average speed total distance foreign total distance is 400 kilometer total time is eight hours eight hours I gave you so answer is 50 kilometer per hour you are absolutely right you are absolutely right because that's the right answer average velocity how much is your average velocity what is the answer for that please think about it come on guys average velocity is foreign foreign zero sir ens foreign obviously yes work done is zero because force and displacement direction is 90 right obviously they take the load guys it's not exactly what you study average that doesn't mean it just means that displacement is mutter foreign so I hope you liked it this was a very good example please be fast I want you guys to be very quick ly thank you are you all done very good answer is option A you know uh Pikachu is going to SpongeBob's house and uh from SpongeBob's house is coming back so he's basically going and coming back so the total distance is 16. so total distance is eight plus eight so 16 divided by total time so the total time taken is two hours so 16 by 2 is 8 kilometer per hour that's the speed and I speed the total distance by total time but velocity is multi average velocity why average velocity is mutai because got it that's it as simple as that instantaneous speed dinosaur s foreign speed okay I hope all of you are clear speed calculated over a very small time interval is so that's a big time interval time intervals for example or a second point one second point zero one second so on the time intervals you will get instantaneous speed got it that's the difference so time interval you will generally calculate average speed time interval rhombus 0.1 seconds that is instantaneous speed okay the ratio of average speed to average low is always more than or equal to one correct average speed to average velocity the ratio is always more than one is it true or false foreign tell me darshan why the answer is option A why is it true what is the answer the answer is very good so the answer is because average speed to average velocity and the ratio so average speed by average velocity and the ratio energy sir speed on the total distance total distance by total time speed average velocity on the total displacement total displacement by total times so in the ratio regroupos are number time we are comparing both for the same thing for the same body let's say so time random can fly around so average speed by Arrow velocity is nothing but total distance by total displacement numbers so distance person this will be greater than or equal to one so this ratio is always more than one or at least it can be equal to one so that's why the answer is true did you all like it very good superb that's how you do it I hope you all enjoyed it Anna please understand average speed average velocity can I say average speed will always be greater than average velocity for the same body average speed will be greater than average velocity can I say average speed will always be greater narrow velocity no so be careful okay read the question carefully got it so please try to solve this is I want you all to be fast everybody please try to solve it yes Inspire moments if displacement is zero average velocity is zero okay so they want average speed they want average speed so average speed formula total distance total distance by total time so total distance kilometer Plus now for the kilometer so along total distance so time I have to find out so how do I find out time so we know speed is equal to Distance by time so upper time is equal to Distance by speed so time taken for this pagudi time taken for the rendered is distance by speed which will be two hours so 2 plus 2 so Allah average speed so average speed average speed is equal to 70 by 4. 70 by 4 will be what 17.5 so that's your right answer option b and I'll go happier did you all enjoy it was it a beautiful question was it epic very good avanishri very good venka tamilgamerasan superpa Vara level darshan it's a beef fantastic job people so that is how you solve it I hope you enjoyed it so did you all like it are you all happy so in the lecture one La in the chapter introductions it's very easy so please go solve some questions okay all the best and in the in the slides in the QR code is we will cover all the crucial topics for your 11th for your 10th board exams and for your 12th board exam okay so take care people all the very best smash the like button before you leave if you enjoyed it take care bye see you in the next one