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00:00conservation of angular momentum
00:02now this is a very important topic
00:04so many questions are asked
00:05what happens
00:06what happens
00:07we have conservation of linear momentum
00:09so this is conservation of angular momentum
00:11so we will write
00:13that the torque is
00:14what we have seen
00:15that is dl upon dt
00:18if the torque of the value is 0
00:22if torque is equal to 0
00:24this means dl upon dt is 0
00:27this means that l doesn't have any change
00:29it means all angular momentum
00:31will be constant
00:33and constant means what about
00:35which initial change
00:37is the final that is
00:38conservation of angular momentum
00:42let's see
00:42things are good
00:44we have seen
00:45I've seen this
00:47based on the walking
00:50and then we have seen
00:50then we have seen
00:51then we have seen
00:52omega value
00:53I'm a distance
00:55we could see
00:56either
00:58omega
00:59Here I have mass M here, here mass M
01:01Ghoomay jarae, ghoomay jarae, ghoomay jarae
01:03Khoj baat nii
01:04Iska kuch angular momentum hooga
01:06Thik hai
01:06Thik hai
01:07Ab iske baad
01:09Hymne kya kya?
01:10Unko thoda door karna shuru ka dia
01:11Toh pahli baat tati
01:13Door wiesa ki kyuni jarae ta
01:14Inko manne yaa pe kuch tension venshin laga karge
01:16Pakar rakhata
01:16Isilie to jab wong ghoom raha ta
01:18Nii to bhar phek to onpe centrifugal force laga raha hooga
01:20Abhi to bhar kyuni jarae
01:22Hymne roka rakhata isko
01:23Tho amne jobhi force ko kum zyada karge
01:25Unko dure kar dia
01:26Ab mainne inko dure kiya
01:28Tho mainne jobhi force laga ya hooga na
01:30Voi is tariqe se laga ya hooga
01:31Ki woi iske center ki taraf pointed
01:33Hai na
01:33Yaha pe centrifugal aise tha
01:35Hymne to is taraf laga raha tha
01:36Centrifugal aise tha
01:37Hymne to isa laga raha tha
01:38Tho ye jobhi forces hai
01:40Ye sab center se pass hote hoortay
01:42Forces hai
01:42In sabhi center se pass hote hoortay
01:44Forces ke karen
01:45Is axis ke about
01:46Koi bhi torque nii aega
01:48Thik hai
01:49Tho amne isko dure kar dia
01:50Torque zero ta
01:52Tho example me
01:54Hamaaya paas
01:54Torque is equal to zero hai
01:56Agar torque ki value zero hai
01:58Iska matlab hum lickhenge
01:59I omega initial
02:01Will be equal to
02:02I omega final
02:04Ab is particular case me
02:06Ho kya raha hai
02:06Ki job bhi
02:07Hymn humarhe paas
02:08Ye mask ko
02:10Aage pichhe kalte hai
02:11Is tariqe se
02:11Tho is case me
02:12Hamaarhe paas
02:13Mask ka axis se
02:14Distance hi to change ho jata hai
02:15Tho distance change ho gaya
02:16Agar aisa ho ega
02:17Tho humarhe paas
02:18Moment of inertia
02:19Upadal jayega
02:20Mask ka position change ho ta hi
02:21Ab dhekho
02:23Yehaan par
02:23Yehi karna hai
02:24Hame
02:24Initial case me
02:25Hame yaan par
02:26Dekhati hai hamaaya paas
02:26Agar yeh length thhi
02:27L
02:28Yeh hai
02:29Maanlo 2L
02:29Yeh mass M hai
02:31Yeh mass M hai
02:32To yehaan par
02:33Hame initially
02:33Moment of inertia
02:34Kitna bhol sakti hai
02:35Uski value
02:36Jati hai
02:36M L square
02:37Times 2
02:38Yeh too
02:39Hameaya paas
02:39Moment of inertia
02:41Aage initial
02:41Omega initial
02:43Mujhe omega
02:43Hi diya hua hai
02:44Tho isko bhi
02:45Omega initial
02:46Lik dhe ta hai
02:46Chalo let's say
02:47Will be equal to
02:49Moment of inertia
02:50Final
02:51Batao bhai
02:51Finally
02:52Moment of inertia
02:52Kitna hai
02:532 mass hai
02:54Tho
02:54Jho bhi hooga
02:55Double hooga
02:56Lekin kis
02:56Chiz ka
02:57Mass
02:57Times
02:57Distance
02:58Ab hooga hai
02:58Hameaya paas
02:592L ke bharabar
03:00Iska
03:01Hame square
03:02Karna padega
03:02Aisai
03:03Chik
03:03Times
03:04Omega
03:05Final
03:05Yehaan par
03:07Aap
03:07Dekho
03:07Khe
03:07ML square
03:08Se
03:08ML square
03:09To cut
03:09Jai
03:09Ghe
03:09Hameaya paas
03:10Value
03:10Busti hai
03:10Acha
03:112
03:11Se
03:112
03:11Bhi
03:11Cut
03:12Jai
03:12Raha
03:12Hameaya paas
03:13Ata
03:13Omega
03:14Initial
03:14Divided
03:15By
03:154
03:16Will be
03:16Equal
03:16To
03:16Omega
03:17Final
03:18To
03:18Jib
03:19Bhi
03:19Hameaya
03:19Paas
03:19Is
03:19Tariqe
03:20Se
03:20Ye
03:20Motion
03:21Hota
03:21Hata
03:21Hameaya
03:21Hameaya
03:22Dekhati
03:22Omega
03:22Ko
03:23Aap
03:23Aisai
03:23Nikal
03:23Sakta
03:23Moment
03:24Of
03:24Inertia
03:24Sori
03:25Moment
03:26Of
03:26Inertia
03:26Ke
03:26Saat
03:26Me
03:26Sko
03:26Relate
03:27Karke
03:27Aap
03:28Dekho
03:28Sawal
03:29Uđtata
03:29Hame
03:29Is
03:30Ais
03:30Bhi
03:31To
03:31Aproach
03:31Sakta
03:31Ki
03:32Energy
03:33Conserve
03:33Karke
03:33Nikal
03:34Lene
03:34To
03:34Kya
03:34Hota
03:34Agar
03:35Maanlo
03:36Me
03:36Aproach
03:36Lagata
03:36Kya
03:37Aproach
03:37Lagata
03:38Kainetic
03:39Energy
03:39Initial
03:39Will
03:40Be
03:40Equal
03:40To
03:40Kinetic
03:41Energy
03:41Final
03:42Agar
03:43Maanlo
03:43Me
03:43Ye
03:43Karna
03:43Chahata
03:44Half
03:46I
03:46Initial
03:47Omega
03:48Initial
03:48Square
03:49Will
03:49Be
03:50Equal
03:50To
03:50Half
03:51I
03:51Final
03:52Omega
03:52Final
03:53Square
03:53Square
03:53Is
03:54Se
03:54Bhi
03:55Mere
03:55Paas
03:55Kuch
03:55Final
03:55Omega
03:56Nikal
03:56Kya
03:56Hati
03:56To
03:57Hem
03:57Nne
03:57Ye
03:58Nih
03:58Kya
03:58Why
03:59Kya
03:59Nih
03:59Kya
03:59Ye
03:59Ye
04:00Ye
04:00Galat
04:00Tariqa
04:00This
04:01Is
04:01Galat
04:01Ye
04:02Wala
04:02Hemarra
04:03Correct
04:03Hai
04:03To
04:03Aysa
04:04Q
04:04Hai
04:04Is
04:05Kya
04:05Jawaab
04:06Ye
04:06Udhata
04:06Kya
04:07Bhi
04:07Yehaan
04:08Pera
04:08Maanlo
04:09Maanlo
04:09Maanlo
04:09Spring
04:09Ki
04:10Tarih
04:10Hota
04:10In
04:11Kya
04:11Centrifugal
04:12Force
04:12Lag
04:12Raya
04:12And
04:13In
04:13Displacement
04:14Bidder
04:14Ho
04:15Gya
04:15I
04:15Neko
04:15Pakard
04:16Nek
04:16Liyye
04:16Is
04:16Tariqa
04:17Se
04:17Force
04:17Lag
04:17Raya
04:17Tha
04:18And
04:19Mera
04:19Hath
04:19Displacement
04:20Dither
04:20Ho
04:20Gya
04:20To
04:21Basically
04:21In
04:21Kya
04:22In
04:22Maas
04:22Vagra
04:23Nne
04:23Mere
04:23Positive
04:24Work
04:24Kera
04:24Diyan
04:24Right
04:24Unneth
04:25For
04:25Force
04:25Laga
04:26Tha
04:26I
04:26Work
04:26Kera
04:26Diyan
04:26Basically
04:27Unnki
04:28Energy
04:28I
04:28Absorbe
04:29Kera
04:29Liyan
04:30Jab
04:31Ais
04:31Baha
04:31Hara
04:31Raha
04:32To
04:32Mene
04:32Energy
04:32Absorbe
04:33Kera
04:33Liyan
04:33Ab
04:34Mene
04:34Insan
04:34Ho
04:34Spring
04:35Hota
04:35To
04:35Absorbe
04:35Kera
04:36Kera
04:36Saka
04:36Saka
04:36Saka
04:36In
04:37Saka
04:37To
04:37Mene
04:37Absorbe
04:37Kera
04:38Saka
04:38Saka
04:38Saka
04:38Saka
04:38Saka
04:38Saka
04:39Saka
04:40Saka
04:40Saka
04:40Saka
04:41Saka
04:42Jib
04:42Unnko
04:42Wapis
04:43Laung
04:43To
04:44Mujhe
04:44Energy
04:44Ne
04:44Waapis
04:45Dene
04:45Pada
04:45In
04:46Fact
04:46Ais
04:46Hota
04:46Bhi
04:46Is
04:47Lik
05:00In
05:01Cases
05:01Mene
05:02Work
05:02Is
05:03Not
05:03Equal
05:04To
05:04Zero
05:04Jou
05:05Force
05:05In
05:05Kera
05:06Move
05:06Kera
05:06Raha
05:07H
05:07Kera
05:07Kera
05:07Kera
05:08Kera
05:08Kera
05:08Kera
05:09Kera
05:09Kera
05:10Kera
05:10Kera
05:11Kera
05:11Kera
05:11Kera
05:12Kera
05:12Kera
05:13Kera
05:13Kera
05:14Kera
05:14Kera
05:15conservation se omega final nikalata hai
05:18ab ispe based bohor sare questions poochay ka hai
05:20toh unko dekhta hai
05:21a mass m moves in a circle on a smooth horizontal plane
05:35with velocity v naught a radius r naught the mass is attached to a string
05:39which passes through a smooth hole in the plane as shown
05:42the tension in the string is increased gradually
05:44and finally m moves in a circle of radius r naught by 2
05:47the final value of kinetic energies
05:49abd dekhoh yahan peh ho kya rao ga
05:50pehle isko qualitatively samajte hai
05:52hemahar paas yahan peh eek mass hai
05:53joh is tariqe se rotate kar raha tha
05:55aur uski kuch velocity v naught hai
05:57aur jab hi rotate kar raha tha
05:59toh batao rassi mein kuch tension ho ga ya nai
06:00rassi mein kuch na kuch tension to hai
06:02ach ach rassi mein idar tension hai
06:04toh yahan peh agar is rassi ki mein baat karo
06:07toh rassi ko niche khi chnye ke liye
06:09mujhe utna hi force lagana padega tension t
06:11aur agar mein bool rahao ki bhai
06:13meinne is rassi ko itna khincha
06:15ki abh iska radius half ho gaya r naught by 2
06:18toh ye toh baat pakki hai ki
06:19hamne isko displacement bhi ishtraf kiya hai r by 2
06:22aur tension ki value change hoorti rheegi
06:24thudha thudha khincha teha hoorti
06:25tension ki value badalti jahe
06:26tension ki value is not fixed
06:27but direction toh same hai
06:29joh bhi insaan ya external agency
06:32isko ishtraf khincha raha hai
06:33usna kuch work done toh kiya hai
06:34kis peh kiya hai
06:36system peh
06:38iski kinetic energy joh initial thi
06:39final kinetic energy usse zyada rheegi
06:42kuchh na kuchh kinetic energy change hooghi
06:44तो ye eek or example hoogaya
06:45iso cheeze ka ki bhai
06:46ham ye nahi karete
06:47half i omega initial ka square
06:49is equal to half i omega final ka square
06:52aisa ham nahi karete
06:53kyunki hapa hem clearly dhek saktay
06:55hama apas kinetic energy change hoonay
06:57wali hai
06:57ab ya hapa dhekho
06:59hamaare paas ye joh force lagara hooga
07:01rassi ki tension ka t
07:02woh center ki tرف pass hoota hooga force
07:05centripetal force
07:06uska naam ye centripetal
07:07toh mein bol dunga bhai
07:09hamaaya paas torque due
07:11to
07:12tension
07:13will be equal to zero
07:14ab yehaan se
07:16aapka kama hai video ko post karo
07:18question ko solve korni ki
07:19kojishish karo
07:19phir iska solution
07:20dhekhen ghe
07:21iska correct answer hai b
07:33solve kerte hai
07:34toh dhekho
07:35hamaare paas
07:36final value of kinetic energy
07:38poochi hai
07:38basically final velocity
07:39mil jaya
07:39toh me ra
07:40kaam ho jaya
07:40ab
07:41kyunki
07:42mere paas
07:42torque ki value zero
07:43hai
07:43kis point ke about
07:45hana
07:45toh ye bhi
07:46yaan peh
07:46likhna
07:46zaruri hai
07:47about
07:47center
07:49bas osi point ke about
07:51torque zero
07:51hooga
07:51osi ke about
07:52hum calculation
07:53bhi karasakte hai
07:54aisa ni hai
07:54ki is point ke about
07:55se batke
07:55dekhen lagun
07:56kabhi tension
07:56idher di
07:56kabhi tension
07:57idher di
07:57torque ki value
07:58har shan
07:59badalti rahe
07:59ki
08:00calculate
08:00hini
08:00karpa
08:01aagar
08:01hamaare paas
08:02torque ki value
08:03zero
08:03hai
08:03toh mei
08:04likh dhunga
08:04bhai
08:04hamaaya paas
08:05angular momentum
08:05conserve
08:06rhega
08:06l initial
08:07will be equal
08:08to l
08:08final
08:09abhi
08:10point
08:11object
08:11hai
08:12jiska
08:12mass
08:12hai
08:12m
08:13iski
08:13velocity
08:13v naught
08:14iske
08:14saap
08:14saap
08:14saap
08:15saap
08:15saap
08:15saap
08:15saap
08:16dhekho
08:16bhai
08:16iski value
08:16sidha
08:16sidha
08:16sidha
08:17aajat
08:17di
08:17mera
08:17paas
08:17initially
08:18angular
08:19moment
08:19mv naught
08:21into
08:21radius
08:22r
08:22or
08:23finally
08:23iske
08:23baad
08:24mass
08:24ki
08:24value
08:25change
08:25nuhi
08:25maas
08:26ki
08:26value
08:27vahe
08:27velocity
08:28kut
08:28change
08:28jai
08:28mujhe
08:29nuhi
08:29pata
08:29uski
08:29value
08:29kitn
08:30or
08:31radius
08:32hamaaya
08:32paas
08:32r
08:32by 2
08:33kar
08:33diya
08:33hai
08:33jaisi
08:34radius
08:35ki
08:35value
08:35r
08:35by 2
08:35kut
08:36di
08:36yaha
08:36se
08:36dhekho
08:36sb
08:36kuch
08:37cut
08:37jata
08:37hamaaya
08:38paas
08:38m
08:38se
08:39m
08:39cut
08:39r
08:39r
08:40cut
08:40gaya
08:40velocity
08:41ki
08:41value
08:41jati
08:42bhai
08:42minne
08:42paas
08:42two
08:42of
08:43times
08:43v
08:43naught
08:44ke
08:44brabber
08:44ho
08:44jai
08:44to
08:45finally
08:46kinetic
08:46energy
08:46kinetic
08:47energy
08:47final
08:48kut
08:48nuhi
08:49half
08:49mv
08:51square
08:51which
08:51is equal
08:51to
08:52half
08:52m
08:53into
08:542
08:54v
08:54naught
08:55square
08:55which
08:55will
08:56be
08:56equal
08:56to
08:562
08:56m
08:57v
08:58naught
08:58square
08:58b
08:59is
08:59our
08:59correct
08:59answer
09:00abh
09:01yaha
09:01par
09:01or
09:01e
09:01chiz
09:02dekho
09:02aap
09:03nai
09:03joh
09:03angular
09:04momentum
09:04likha
09:04is
09:05hiko
09:05likhnye
09:05ka
09:05or
09:05e
09:06tariqa
09:06ho
09:06sakta
09:06is
09:06kuk
09:07likhnye
09:07ka
09:07tariqa
09:07kya
09:07ho
09:07saka
09:08ha
09:08moment
09:09of
09:11inertia
09:12initial
09:12into
09:13omega
09:13initial
09:13will
09:14be
09:14equal
09:14to
09:14moment
09:15of
09:15energy
09:15final
09:15into
09:16omega
09:16final
09:16aise
09:17likhna
09:17chahun
09:17to
09:18bhi
09:18sako
09:18solve
09:19kiya
09:19jasakta
09:19hai
09:19initial
09:22moment
09:23of
09:23inertia
09:23kitna
09:24ho
09:24mass
09:25m
09:25hai
09:25r
09:25distance
09:26ki
09:26dori
09:26pere
09:26is
09:27ko
09:27m
09:28r
09:29square
09:29omega
09:30initial
09:31kitna
09:31hai
09:31omega
09:32initial
09:33ho
09:33jae
09:33gha
09:33v
09:34naught
09:34upon
09:34r
09:35will
09:36be
09:38equal
09:39to
09:39final
09:40moment
09:41of
09:41inertia
09:41m
09:43into
09:43r
09:44by
09:442
09:44square
09:45final
09:46hamaaya
09:47paas
09:47omega
09:47kitna
09:47ho
09:47jae
09:48finally
09:48velocity
09:49v
09:49at
09:49a
09:49distance
09:50of
09:50r
09:50by
09:502
09:51is
09:51tari
09:51kai
09:51se
09:51ab
09:52here
09:52haan
09:52se
09:52bhi
09:52same
09:53result
09:53m
09:54r
09:54square
09:55m
09:55r
09:55square
09:56cut
09:56jata
09:56hai
09:561
09:57r
09:57r
09:57cut
09:58jata
09:58hai
09:58and
09:59hamaaya
09:59paas
09:59two
10:00ka
10:00square
10:00hai
10:00here
10:01denominator
10:01two
10:02to
10:02basically
10:02here
10:02hamaaya
10:03paas
10:03two
10:03bach
10:03jayega
10:04yaha
10:05sa
10:05bhi
10:05same
10:06result
10:06milta
10:06hai
10:07joh
10:07velocity
10:07hai
10:08two
10:08times
10:08v
10:09not
10:09ho
10:09jayegi
10:10to
10:10concept
10:11v
10:11angular
10:12momentum
10:13constant
10:13raha
10:13hamaaya
10:14paas
10:14likhanay
10:15kye
10:15duno
10:15tariqe
10:15hama
10:16point
10:16mass
10:16ki
10:16tarih
10:17lo
10:17chahe
10:18us
10:18ko
10:18ap
10:18is
10:18tariqe
10:19se
10:19moment
10:19of
10:20inertia
10:20or
10:20omega
10:20ki
10:20terms
10:21me
10:21answer
10:22same
10:22a
10:33solid
10:33sphere
10:34is
10:34rotating
10:34freely
10:35about
10:35its
10:35symmetry
10:36axis
10:36in
10:36free
10:36space
10:37the
10:38radius
10:38of
10:38the
10:38sphere
10:38is
10:39increased
10:39keeping
10:39its
10:40mass
10:40same
10:41which
10:41of
10:41the
10:42following
10:42physical
10:42quantities
10:43would
10:43remain
10:43constant
10:44hamaaya
10:44paas
10:45a
10:45sa
10:45tariqa
10:45sa
10:45spheer
10:46tha
10:46wo
10:46rotate
10:46karra
10:47da
10:47a
10:47sa
10:47aur
10:48usko
10:49bada
10:49ka
10:49di
10:49hum
10:49ne
10:50jib
10:50usko
10:51hum
10:51bada
10:51kiya
10:52hai
10:52to
10:53yaha
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