𝐖𝐡𝐨𝐥𝐞 𝐂𝐡𝐚𝐩𝐭𝐞𝐫 𝐬𝐡𝐨𝐫𝐭 𝐧𝐨𝐭𝐞 : Force: Force is any interaction which when unopposed produces acceleration in an object. • It's SI unit is Newton denoted by capital N • It's fundamental unit is Kgm/s^2(force = mass x acceleration therefore Newton = kg× m/s^2 ) • It's CGS unit is Dyne 1N = 10^5 Dyne • Acceleration is produced due to force. Force is the reason behind acceleration. • Force is of two type: 𝐈. 𝐁𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐅𝐨𝐫𝐜𝐞 𝐈𝐈. 𝐔𝐧𝐛𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐅𝐨𝐫𝐜𝐞 i. Balanced force : set of forces which produce zero acceleration is called balanced force. In points : • Net force acting on the body is zero. • Net acceleration is also zero. • It is the reason behind maintaing the previous inertia of the body i.e Rest, motion or direction. • The body is moving according to the previous inertia i.e Rest, motion Or direction. ii. Unbalanced force : the set of forces which produce non zero acceleration is called unbalanced force. In points: • Net force acting on the body is non-zero. • Net acceleration is non-zero. • It is the reason behind changing the previous inertia of the body. • The body is in accelerated motion. 𝐈𝐧𝐞𝐫𝐭𝐢𝐚 : The property of a body to oppose the change in its state i.e rest, motion or direction. • Inertia is directly proportional to the mass of the body. • More the mass, more will be the inertia. 𝐄𝐱 of inertia of 𝐫𝐞𝐬𝐭: i. When a car accelerates abruptly our lower body, which is in contact of car moves forward but our upper body remains in rest due to inertia and we move backward. ii. When the branch of tree is shaken vigorously, the leaves, fruits or flower hanged on the branch fall down. The branch of tree comes in motion due to shaking but the leaves, fruits and flowers remains in rest due to inertia and get detached. 𝐄𝐱 of inertia of 𝐦𝐨𝐭𝐢𝐨𝐧:- i. When the bus stops suddenly, we move forward. ii. Bicycle moves for some distance until frictional force stop it even without peddling. 𝐄𝐱 of inertia of 𝐝𝐢𝐫𝐞𝐜𝐭𝐢𝐨𝐧: i. We found it difficult to change the direction of a bike moving with high speed . This is due to inertia of motion as the bike is moving in the straight direction and opposes to change it's direction. •Galelieo Galilee said that "the body is naturally either in rest or in uniform motion". • An external unbalanced force is required to change the state (rest Or motion) of an object. Then after Isaac Newton gave his three laws of motion : i. Law of inertia ii. Law of mass and acceleration iii. Law of motion #𝟏𝐬𝐭 𝐋𝐀𝐖 :- • It states that, " A body at rest will remain at rest and a body in motion will continue in motion in a straight line with a uniform speed, unless an external unbalanced force is applied on the body " • If a body is moving with constant acceleration then constant force is appliyng on the body (continuously) . # 𝐌𝐨𝐦𝐞𝐧𝐭𝐮𝐦 :- • It is the quantity of motion contained by a body. • It is the product of mass of a body and it's velocity. • It is denoted by small (p). • It's SI unit is Kgm/s or Kgms^-1. • It's formula :- Momentum = mass x velocity p = mv • Change in momentum is denoted by ∆p (pronounciation: delta p ∆ is used to denote change ). #𝟐𝐧𝐝 𝐋𝐀𝐖 :- • It states that, " Rate of change in momentum is directly proportional to the external unbalanced force applied on the body." • Acceleration produced in a body is directly proportional to the force acting on it and inversely proportional to the mass of the body. • Rate of change in momentum is denoted by ∆ p. • Therefore, Force ∝ Change in momentum / Time. F ∝ ∆p / ∆ t. # 𝐃𝐞𝐫𝐢𝐯𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 𝐟𝐨𝐫𝐦𝐮𝐥𝐚 𝐅= 𝐦𝐚 ( 𝐅𝐨𝐫𝐜𝐞 = 𝐦𝐚𝐬𝐬 × 𝐚𝐜𝐜𝐞𝐥𝐞𝐫𝐚𝐭𝐢𝐨𝐧) • F = ma is a derived formula. Derivation :- F ∝ ∆p / ∆t F ∝ mv - mu /t (mv = mass × final velocity , mu = mass x initial velocity). F ∝ m( v-u) /t F ∝ ma (a = v-u/t ) F = kma (where k is constant..) The value of k in SI unit is 1, so the above equation becomes:- F = ma #𝐍𝐨𝐭𝐞: To remove propotionality we have to put a constant, like we done : F ∝ ma F = kma (k is constant). #𝟑𝐫𝐝 𝐋𝐀𝐖 • It states that, " Whenever one body exerts force on another body, the second body exerts equal and opposite force on the first body. • In other words, " To every action their is an equal and opposite reaction". • Ex:- we walk (force on ground, action ; force on foot reaction), we swim etc.. # 𝐀𝐜𝐭𝐢𝐨𝐧 𝐑𝐞𝐚𝐜𝐭𝐢𝐨𝐧 𝐏𝐚𝐢𝐫 • Acts on two different bodies • Action-reaction pair has force of same nature. • Forces are collinear • No delay
Newton's 4th law says that every book continues to be in rest until and unless interal or external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant.
Newton's 4th laws says that every book continuous to be in rest until and unless internal and external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant😊
1:23:30 Force in opposite direction i.e retardation or negative acceleration to stop the car. ➡️🚗⬅️( - 7500 Newton )force is applied to stop the car as its initial force was 7500 Newton 7500N +(-7500N)=0 The car came in the state of rest..
If a minus sign comes with the force, it will indicate that the force is acting in a direction opposite to that in which the body is moving ( just as the force of friction acts in a direction opposite to that of moving body)
1:23:35-The negative sign denotes only the direction. Force is a vector quantity so that that force can be opposing, depending on direction and magnitude. If the implemented force is in the reverse direction to the displacement of the traveling object, then the force will be opposing or negative.
Newton's 4th law says that every book continues to be at rest until and unless internal or external exams appear and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant.😅😅 Edit : Thanks for the Likes but this is just a joke don't take it seriously😁😁
Timestaps:- 0:00 to 13:50 - Force 13:50 to 41:00 - Balance and Unbalanced Force 41:15 to 56:42 - Inertia 56:50 to 1:01:44 - Newton's 1st Laws 1:01:48 to 1:06:32 - Momentum 1:06:35 to 1:23:41 - Newton's Second Law 1:23:53 to 1:30:14 - Impact Of Force 1:30:30 to 1:32:03 Question 1:32:05 to 1:54:00 Newton's Third Law
1:23:26- The force came as negative because when brakes were applied , then there was a retarding force acting opposite to the direction of motion of motorcyle
22:18 the body will be at rest or uniform but the answer is :- the body will stay in rest because the force is applied is in both the direction so it will be constant it will neither be accelerated nor be deaccelerated (no change in velocity) in the case of balanced force !
I want to request PW Foundation Team to let Rakshak sir teach us in the One Shot Series of 2024-25 unlike in the last session where another teacher taught. Rakshak sir teaches Physics in an intereseting manner so pls Rakshak Sir should be our teacher this time. We would be really thankful!
@@imranhossain8184 bro i am also from 11th we are watching this to clear our base so we can easily understand newton laws and motion. it is a chapter of class 11th which include the basics of class 9th.
Ye retarding force hai matlab speed kam hoti jati hai aur friction force ( oppose the motion) opposite direction me lagta hai jiske Karen force minus me ho jata hai
22:32 because both force are applied in opposite directions and both the force are same so they will cancel each other and state of that object will be rest.
1:23:31 Sir since brake is applied the force applied to stop is also acting backwards, and anything applied backwards is negative. Therefore the force in answer is negative.
1:23:21 Force = -7500 bcoz jo force hai vo cartesian plane ke hisab se force west direction mei lag rhi hai or motion mei +/- bass direction batane keliye use kiya jaata hai
22:01 sir vo is bat pe depend karti hai ki object pehle rest pe tha ya motion me tha Agar rest pe hoga to rest hi degi or motion ( uniform or non uniform) me hogi to objet motion me hi rahega
@@Singh-shubham-z to bhai ek bar khud hi soch.. na hi tereko na hi mereko balki kisi ko nahi pata object uniformly chal raha hai ya non uniformly . Kul milake bat yahi hai ki agar net force hi 0 hai to object me to koi force act hi nahi karegi
Last month when my halfyearly was so close I came here for revision and to touch up the chapter but this sir gave so many motivations in a darauni way that I came here in the first day after examination. So that I can complete everything on time ❤️ love you sir
Timestaps:- 0:00 to 13:50 - Force 13:50 to 41:00 - Balance and Unbalanced Force 41:15 to 56:42 - Inertia 56:50 to 1:01:44 - Newton's 1st Laws 1:01:48 to 1:06:32 - Momentum 1:06:35 to 1:23:41 - Newton's Second Law 1:23:53 to 1:30:14 - Impact Of Force 1:30:30 to 1:32:03 Question 1:32:05 to 1:54:00 Newton's Third Law 👍🏻👍🏻👍🏻
ANS. Minus sign represents that the force is opposing the motion. The break apply force on the wheels of car in opposite direction of motion to make it to come at rest
Action reaction pair 》》 ▪︎Action- boy to car Reaction- car to boy in opposite direction ▪︎Action- gun to bullet in forward direction Reaction- bullet to gun in backward direction ▪︎Action - nozzle to water Reaction- water to nozzle in backward direction ▪︎Action- rocket to earth Reaction- earth to rocket ▪︎Action- man to boat Reaction - boat to man Thank you sir for this amazing lecture 🥰🥰🙂🙂
To increase the time of change in momentum cricketers move their hand back while taking a catch. As force is inversely proportional to time therefore more time taken for change in momentum results in lesser impact of ball on his hand which avoids injury.
i have final exam after 6 hours and now i am revising full physics (chemistry is left) but i will surely complete everything in revision and score well
Sir - ka sign islie aaya hai kyonki Sir Frictional force opposite direction me lgi hai Engine ki direction k Sir acton F is = Gun on bullet and Reaction F is = bullet on Gun
Sir mai abhi 11th mai aya hu aur maine ye video apni 9th mai bhi dekhi but maine PCM li hai to ek baar 9th ke concept revise kr rha 2x speed mai kyuki 11th mai max concept link hote hai 9th se
NEWTON'S 4TH LAW: Every book continues to be at rest and covered with dust until and unless internal or external exam appears. And the speed of turning pages is directly proportional to the syllabus to be completed. But the tension remains constant
sir maza aata hai physics mai 8th mai hi paadh raha hun baas yaah lagta hah ki app jaase teacher school mai ho na to aasa ho nehi sakta ki phisics mai kisi ka intrest na ban paay PW and you are best thanku
Newton's 4th law says that every book continue to be in rest until and unless internal or external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant. '
1:23:39 because momenteum is vector quantiry jisme direction chahiye toh direcrion batane kai liye - sign laga hai it means ki break ka jo force hai vo 7500 hai air pichw ki dirwction mai hai
Minus sign before force indicates that force is applied in opposite direction in which the body is moving(like it is a frictional force stoping the vehicle)
We can also say that the - sign represents the force exterted by the brakes which is 7500N but as it is in opp velocity in relation to the body it is denoted as - if the movement of body is denoted as - then the force exterted by breaks will be in positive the - represents the direction of force here
यदि कोई गेंद किसी तिरछी सतह पर है और आप उसे छोड़ देते हैं तो गुरुत्वाकर्षण उसे ढलान पर लुढ़कने पर मजबूर कर देगा, इसमें जड़ता है और यदि ढलान के नीचे एक समतल क्षेत्र है तो वह चलती रहेगी।
Foundation Class 9th Sprint Batch 👉 bit.ly/3VS4OrG
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Hii sir
Sir menti laye physics VS Maths Mohit poonia sir se
Anyone from Neev 1.O
Sir promised us that he will come on UA-cam to meet us again......
KOP is Back 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
@@samrattripathi9935 what is the meaning of KOP 😅😅😅😅
@@lavishjeph467 King of physics
Aap jaisa teacher agar hame classroom me mil jaye to ham physics ka genius ban jayenge
hmm
What about backbenchers 😂😂...
@@udaan_2024 u can also do it man 😉😉
@@vanamy7542 I am a backbenchers 😈bro... Not kidding
@@udaan_2024 me too bro 💜💜
𝐖𝐡𝐨𝐥𝐞 𝐂𝐡𝐚𝐩𝐭𝐞𝐫 𝐬𝐡𝐨𝐫𝐭 𝐧𝐨𝐭𝐞 :
Force: Force is any interaction which when unopposed produces acceleration in an object.
• It's SI unit is Newton denoted by capital N
• It's fundamental unit is Kgm/s^2(force = mass x acceleration therefore Newton = kg× m/s^2 )
• It's CGS unit is Dyne
1N = 10^5 Dyne
• Acceleration is produced due to force. Force is the reason behind acceleration.
• Force is of two type:
𝐈. 𝐁𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐅𝐨𝐫𝐜𝐞
𝐈𝐈. 𝐔𝐧𝐛𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐅𝐨𝐫𝐜𝐞
i. Balanced force : set of forces which produce zero acceleration is called balanced force.
In points :
• Net force acting on the body is zero.
• Net acceleration is also zero.
• It is the reason behind maintaing the previous inertia of the body i.e Rest, motion or direction.
• The body is moving according to the previous inertia i.e Rest, motion Or direction.
ii. Unbalanced force : the set of forces which produce non zero acceleration is called unbalanced force.
In points:
• Net force acting on the body is non-zero.
• Net acceleration is non-zero.
• It is the reason behind changing the previous inertia of the body.
• The body is in accelerated motion.
𝐈𝐧𝐞𝐫𝐭𝐢𝐚 : The property of a body to oppose the change in its state i.e rest, motion or direction.
• Inertia is directly proportional to the mass of the body.
• More the mass, more will be the inertia.
𝐄𝐱 of inertia of 𝐫𝐞𝐬𝐭:
i. When a car accelerates abruptly our lower body, which is in contact of car moves forward but our upper body remains in rest due to inertia and we move backward.
ii. When the branch of tree is shaken vigorously, the leaves, fruits or flower hanged on the branch fall down. The branch of tree comes in motion due to shaking but the leaves, fruits and flowers remains in rest due to inertia and get detached.
𝐄𝐱 of inertia of 𝐦𝐨𝐭𝐢𝐨𝐧:-
i. When the bus stops suddenly, we move forward.
ii. Bicycle moves for some distance until frictional force stop it even without peddling.
𝐄𝐱 of inertia of 𝐝𝐢𝐫𝐞𝐜𝐭𝐢𝐨𝐧:
i. We found it difficult to change the direction of a bike moving with high speed . This is due to inertia of motion as the bike is moving in the straight direction and opposes to change it's direction.
•Galelieo Galilee said that "the body is naturally either in rest or in uniform motion".
• An external unbalanced force is required to change the state (rest Or motion) of an object.
Then after Isaac Newton gave his three laws of motion :
i. Law of inertia
ii. Law of mass and acceleration
iii. Law of motion
#𝟏𝐬𝐭 𝐋𝐀𝐖 :-
• It states that, " A body at rest will remain at rest and a body in motion will continue in motion in a straight line with a uniform speed, unless an external unbalanced force is applied on the body "
• If a body is moving with constant acceleration then constant force is appliyng on the body (continuously) .
# 𝐌𝐨𝐦𝐞𝐧𝐭𝐮𝐦 :-
• It is the quantity of motion contained by a body.
• It is the product of mass of a body and it's velocity.
• It is denoted by small (p).
• It's SI unit is Kgm/s or Kgms^-1.
• It's formula :-
Momentum = mass x velocity
p = mv
• Change in momentum is denoted by ∆p (pronounciation: delta p
∆ is used to denote change ).
#𝟐𝐧𝐝 𝐋𝐀𝐖 :-
• It states that, " Rate of change in momentum is directly proportional to the external unbalanced force applied on the body."
• Acceleration produced in a body is directly proportional to the force acting on it and inversely proportional to the mass of the body.
• Rate of change in momentum is denoted by ∆ p.
• Therefore,
Force ∝ Change in momentum / Time.
F ∝ ∆p / ∆ t.
# 𝐃𝐞𝐫𝐢𝐯𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 𝐟𝐨𝐫𝐦𝐮𝐥𝐚 𝐅= 𝐦𝐚 ( 𝐅𝐨𝐫𝐜𝐞 = 𝐦𝐚𝐬𝐬 × 𝐚𝐜𝐜𝐞𝐥𝐞𝐫𝐚𝐭𝐢𝐨𝐧)
• F = ma is a derived formula.
Derivation :-
F ∝ ∆p / ∆t
F ∝ mv - mu /t (mv = mass × final velocity , mu = mass x initial velocity).
F ∝ m( v-u) /t
F ∝ ma (a = v-u/t )
F = kma (where k is constant..)
The value of k in SI unit is 1, so the above equation becomes:-
F = ma
#𝐍𝐨𝐭𝐞: To remove propotionality we have to put a constant, like we done :
F ∝ ma
F = kma (k is constant).
#𝟑𝐫𝐝 𝐋𝐀𝐖
• It states that, " Whenever one body exerts force on another body, the second body exerts equal and opposite force on the first body.
• In other words, " To every action their is an equal and opposite reaction".
• Ex:- we walk (force on ground, action ; force on foot reaction), we swim etc..
# 𝐀𝐜𝐭𝐢𝐨𝐧 𝐑𝐞𝐚𝐜𝐭𝐢𝐨𝐧 𝐏𝐚𝐢𝐫
• Acts on two different bodies
• Action-reaction pair has force of same nature.
• Forces are collinear
• No delay
Like kr do guys 😅
Sch me yrr itti mehnat kii h bhaii ne.....
Thanks Bhai 🎉🎉
Bhai top pe to iss comment ko hona chahiye
@@mr.gaminggroove5401yes
People who watch this in 2024
✋😅
Edit - I like all the reply's 🌚 (thanks for likes)
😂😂😊
😅😂😂
😅
@@SiaHey-xj5gp are you from class 9th 😅
😅
0:00 to 13:50 - Force
13:50 to 41:00 - Balance and Unbalanced Force
41:15 to 56:42 - Inertia
56:50 to 1:01:44 - Newton's 1st Laws
1:01:48 to 1:06:32 - Momentum
1:06:35 to 1:23:41 - Newton's Second Law
1:23:53 to 1:30:14 - Impact Of Force
1:30:30 to 1:32:03 Question
1:32:05 to 1:54:00 Newton's Third Law
tysm
Thanks sis😢
Thnxs
Thanks ❤
thanks
Newton's 4th law says that every book continues to be in rest until and unless interal or external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant.
Old meme
It's not Newton law,it's students law 🤣🤣🤣🤣
Bhai ye 3 law to yad nhi hota tum fourth law bhi le aye
Waah Bhai waah 🙂
Bro 😭
5th Law of Motion:-
The Reduction of Tension is occured when the exam are over and holidays are applied
Ekdam sahi❤❤😢😢
Genius
😂😅
2nd newton 😂🎉
😂
Anyone watching in August 2024
Yup bro
Me present 🤣
Yeah bruh
Hey
Me brother 😂
Newton's 4th laws says that every book continuous to be in rest until and unless internal and external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant😊
Whaaaaa jii
Rantsgamer3526's 4th law of motion. 😂
Relatable
😢😢 ek aur law
You just copied the comment 🤡
Bagwan 🗽 kare sab exam me pass ho jaye 🎉....... With high percent ❤👑
Bhai tere muh m ghee shakar
Bhai vhi toh chahiye hi hai bs...😅😅🥲
@@mrvilengaming16 keep going 🤩
@@iamshreyashiupadhyay are sab pass ho jaye ge 👑
Akash Asia ho pata😢
Anyone watching in august😅😂💫
Hii
1:23:30
Force in opposite direction i.e retardation or negative acceleration to stop the car.
➡️🚗⬅️( - 7500 Newton )force is applied to stop the car as its initial force was 7500 Newton
7500N +(-7500N)=0
The car came in the state of rest..
1:23:23
It means that force is acting in the opposite direction of the moving object
If a minus sign comes with the force, it will indicate that the force is acting in a direction opposite to that in which the body is moving ( just as the force of friction acts in a direction opposite to that of moving body)
🎉
Yes correct ✔✅🙂
In S.chand same line is given
Or it can be say as retardation in physics term☺️☺️
Thanks for explaining ❤
Action : *Sir's effort for teaching me*
Reaction: *I got full marks in physics*
bdhai ho bro
bro important questions bta do
🎉🎉😮😮😢😢😅😅😊 32:06 32:07
Me too
Right😊
1:23:35-The negative sign denotes only the direction. Force is a vector quantity so that that force can be opposing, depending on direction and magnitude. If the implemented force is in the reverse direction to the displacement of the traveling object, then the force will be opposing or negative.
Right bro 👍👍👍
❤
thanks bro
Sahi hai 🎉🎉
Thanks
1:23:00 force is a vector quantity and the negative sign is denotes only the direction
Anyone watching in july😅
🎉Ys
Yes😊
Yes now it's gonna over 😢😢our summer vacations gonna finish 😢😢
yex
Yes😊
Newton's 4th law says that every book continues to be at rest until and unless internal or external exams appear and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant.😅😅
Edit : Thanks for the Likes but this is just a joke don't take it seriously😁😁
🤣🤣🤣🤣
Bhai saab that's called real science student 😅😂😂😂😂😂😂
@@lofilyricseditzz 😂😂
Bruh.... 😂😂
Bigg brainnn💯
Timestaps:-
0:00 to 13:50 - Force
13:50 to 41:00 - Balance and Unbalanced Force
41:15 to 56:42 - Inertia
56:50 to 1:01:44 - Newton's 1st Laws
1:01:48 to 1:06:32 - Momentum
1:06:35 to 1:23:41 - Newton's Second Law
1:23:53 to 1:30:14 - Impact Of Force
1:30:30 to 1:32:03 Question
1:32:05 to 1:54:00 Newton's Third Law
Pr bhai maine to nhi manga
PW is not a company. It's a emotion 😊❤
Pw is a institution
@@vgaming1420 yup
@@vgaming1420😅😂😂
Understand his feeling
@@veenakumari3229areh yaar concept samajh nhi aa raha toh uski feelings kya understand kre😂
1:23:26- The force came as negative because when brakes were applied , then there was a retarding force acting opposite to the direction of motion of motorcyle
1:23:47 ijj
Thanks🙃
@@Lilyy_Fushi welcome !
right
Dp😂
Jo Jo bache 2024 me July me dekh rhe he vo like karo
Yes
present
Me bro
Mera question copy mat karo
29:47 orphan kid crying in the corner💀
😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😅😂😅😂😅😂😅😂😅😅😂😅😂😂😅😂😅😂😅😂😅😅😂😅😂😂😂😅😂😅😂😂😅😂😅😅😂😅😂😅😂😅😂😅😂😅😂😅😂😅😂😅😂😅😅😂😅😂😅😅😂😅😂😅😂😅😂😅😂😂😂😂😂😂😂😂😂😂😂
Rest and uniform motion 22:22
As if a body is moving in uniform motion that means balanced force is applied
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
🎉nice🎉
1:28:12 ab samjh aaya sir ki films mein slow motion mein kyu girte hai log 😂🌝 agar rate zyada hua toh impact bhut zyada hoga 😮💨👀🤣
Batch 2024-2025 wale attandance lagao 👇👇
Me
Me
@hmmAryansharma-o2q
52:16-------NEWTONS 1st LAW-
when we doesn't want to study then we dont study untill and unless any exams or test conducted😂😂
lmao
😂😂😂😂
1:23:41 negative due to acceleration on the opposite side
22:18 the body will be at rest or uniform but the answer is :- the body will stay in rest because the force is applied is in both the direction so it will be constant it will neither be accelerated nor be deaccelerated (no change in velocity) in the case of balanced force !
22:18 Both rest as well as uniform motion !
But will be in uniform motion if already in state of motion
This one lecture is enough to clear my 11th basics. World's best lecture 👌
Bhai dekh abb 9th ma bina padhe pass hone ke baad kya hota ha 11th ma Jake 9th ka lecture dekh rha ha
1:23:32
The subtraction/minus sign is there to denote the negative acceleration or retardation due to the breaking force applied on the car.
Negative acceleration is the brake applied
@@laksh2367no it is retardation
@@laksh2367 can we say due to frictional force there is minus ??
@@taranumkhan2300
No
plz watch motion chapter properly
@@GamingMasterX77 yaa
30:00 sir papa be like . baap baap ho tha hai beta bet ho tha hai 😂
Who is watching this for tomorrow test😂😊
This lecture without papa was not possible 😂😅 . So please watch this lecture with your father to understand concept easily.
I can understand concept by my self
Abe maajak bhe nahi samaj te ka bah i
Right 👍🏻
@@GodOfThisNewWorld u didnt listen to it carefully thats why you didnt understand the joke🤣
Hey master mera bachcha h tu
A small tip to my friends
Understand the concept of gravitation as much deep as much you can as it will help you in class11
Fun fact: u r not in class 11 . U r just showing off for likes😂😂
@@Undefined_infinity how you know that, he is not in class 11 🤔
@@MrWarikoo kyuki woh NLM k lec k neeche Gravitation ki baat kr rha h😂
@@Ayush-bg9gw NLM matlab ?
@@MrWarikoo Kuch nhi bhai
Tu boards ki taiyaari krle
I want to request PW Foundation Team to let Rakshak sir teach us in the One Shot Series of 2024-25 unlike in the last session where another teacher taught.
Rakshak sir teaches Physics in an intereseting manner so pls Rakshak Sir should be our teacher this time.
We would be really thankful!
Those Who Are Watching Before Half Yearly...!!
Best Of Luck 🙃🤍
Brothers/Sisters ♡
Third Law of Motion , To every action, there is an equal and opposite reaction (Ex- We push a wall) best and easy example 👍👍
I still remember watching rakshak sir's lectures now I'm in 11 class ( got 95% in 10) . I feel so nostalgic. 🥺🥺🥺🥺🥺🥺🥺🤧🤧🤧Love u sir ❤️❤️❤️❤️❤️❤️❤️
So what are u doing in class 9 lecture..... nostalgia😅😅😅
Bro he/she is doing revision for his/her exams because 9th class is the base 😒
@@imranhossain8184 bro i am also from 11th we are watching this to clear our base so we can easily understand newton laws and motion. it is a chapter of class 11th which include the basics of class 9th.
Agar aap 11th mein hai to abhi 9th ke lecture mein comment kyu kr rhe hai????
@@angel33sri dear this video poppped out so I just came here😊😊😊😊.
1:23:19 if a minus sigb comes with the force it will indicate that the force is acting in opposite direction to that in which the body is moving
Ye retarding force hai matlab speed kam hoti jati hai aur friction force ( oppose the motion) opposite direction me lagta hai jiske Karen force minus me ho jata hai
Yes correct correct very correct.👏💯
Anyone watching in 28,29,30,31 August 😂😂😂😂😂😂
Please like here
👇
31st how would u know
1 sep ko watch kr rhi huu...
@@DevLodhi-rn2gv usss hogyaa
@@DevLodhi-rn2gvpaper hai 9 sep se isiliye 😅
@@editzz1648nhi toh....27 sep ko hai....
22:32 because both force are applied in opposite directions and both the force are same so they will cancel each other and state of that object will be rest.
1:23:31 Sir since brake is applied the force applied to stop is also acting backwards, and anything applied backwards is negative. Therefore the force in answer is negative.
Good
Right answer
I got 96% in my PT -I exam ✌️🤩 thank you sir 🎉❤
Hlo
Hmm
Hmm
Mera to 98 .23 % aaya tha
@@Iftikar_Choudhury entout public school
1:23:21 Force = -7500 bcoz jo force hai vo
cartesian plane ke hisab se force west direction mei lag rhi hai or motion mei +/- bass direction batane keliye use kiya jaata hai
Hii
22:01 sir vo is bat pe depend karti hai ki object pehle rest pe tha ya motion me tha
Agar rest pe hoga to rest hi degi or motion ( uniform or non uniform) me hogi to objet motion me hi rahega
Non uniform motion likhana sahi nhi hai 😑😑
@@Singh-shubham-z to bhai ek bar khud hi soch.. na hi tereko na hi mereko balki kisi ko nahi pata object uniformly chal raha hai ya non uniformly . Kul milake bat yahi hai ki agar net force hi 0 hai to object me to koi force act hi nahi karegi
Very lucky those parents who birth this great person ❤❤❤❤❤❤❤❤😊😊😊😊😊😊
1:23:26, The magnitude of forces is negative it means that :
Force is acting in the opposite direction of acceleration. Thank you sir🥰🥰🥰🥰
It's deceleration or retardation because of acceleration happen in opposite side of mass of body...
Nice
The magnitude of force is negative because there is retardation and force is acting opposite to the motion of the car.
It also shows that force is a vector quantity
Last month when my halfyearly was so close I came here for revision and to touch up the chapter but this sir gave so many motivations in a darauni way that I came here in the first day after examination. So that I can complete everything on time ❤️ love you sir
Okk hjii
1:23:32 because the force is applied in opposite direction as the force applied is of brakes
Retardation ho Raha h isiliye na 🤨
Yupsss @@Navmanshi
Sahi hai bhai tumhara 👌👌
@@deveshsingh1030 behen*
Timestaps:-
0:00 to 13:50 - Force
13:50 to 41:00 - Balance and Unbalanced Force
41:15 to 56:42 - Inertia
56:50 to 1:01:44 - Newton's 1st Laws
1:01:48 to 1:06:32 - Momentum
1:06:35 to 1:23:41 - Newton's Second Law
1:23:53 to 1:30:14 - Impact Of Force
1:30:30 to 1:32:03 Question
1:32:05 to 1:54:00 Newton's Third Law
👍🏻👍🏻👍🏻
ANS. Minus sign represents that the force is opposing the motion.
The break apply force on the wheels of car in opposite direction of motion to make it to come at rest
I am class 10 pass out students still I am studying all chapter of 9 class math and science 😊
same here
Ya same here
Same hear
Why??
Kitni percentage aayi?
July mein periodic test ke liye dekh rhe ho tho like karlo
Bhai tum konse school se ho
@@Omgupta175-d7t me from JIS banglore
Hnnnn
K. V muzaffarpur in bihar
Nahi periodic se ek din phle dekh rha hu😂😊😅😂😊😂😅😅😂😊😂😊😂😅😂😅😂
Action reaction pair 》》
▪︎Action- boy to car
Reaction- car to boy in opposite direction
▪︎Action- gun to bullet in forward direction
Reaction- bullet to gun in backward direction
▪︎Action - nozzle to water
Reaction- water to nozzle in backward direction
▪︎Action- rocket to earth
Reaction- earth to rocket
▪︎Action- man to boat
Reaction - boat to man
Thank you sir for this amazing lecture 🥰🥰🙂🙂
Bhkkkkkk
Pagal ai sirri😂😂😂 Bo Bhai sahi kah rahen hain😂😂
To increase the time of change in momentum cricketers move their hand back while taking a catch. As force is inversely proportional to time therefore more time taken for change in momentum results in lesser impact of ball on his hand which avoids injury.
Anyone in August ?? 👍👍
Pagal
Yes😂
Sir the negative sign tells us that the force exerted by the brakes is opposite to the direction of motion of the motorcar👍👍✍️
Hiii
Hii 😢😅😂
Gan*
1:23:45 it came minus because the force is applied on opposite direction
1:23:30 - > Because Force Is Applied In Opposite Direction
Also known as retardation?
Hi
@@navneetsreview5897Hello
Anyone watching in 16-17-18 august attendence here
Salute for those who's half yearly exam is tomorrow like me.
i have final exam after 6 hours and now i am revising full physics
(chemistry is left)
but i will surely complete everything in revision and score well
Nah bro 😎 I am watching this video one night before 😅 finall exam 😎
1:23:38 ,
Because the brakes applied which is negative acceleration or retardation .
Thankyou ❤
Right...❤
1:23:22 BECAUSE FORCE IS APPLIED ON THE LEFT SIDE AND WITH RESPECT TO Cartation plane ❤
Cartesian
Auto correct ho gaya honga
1:45:55 kyaa baat hai sirr!!!!sachh mein mooj karr dii😅😜
1:23:25 because the force is being applied on the opposite direction ❤
Ummm but real reason is bc of retardation taking place
Friction force
22:18 The condition of rest will be achieved because there is no external force acting on the object.
Sir - ka sign islie aaya hai kyonki Sir Frictional force opposite direction me lgi hai Engine ki direction k
Sir acton F is = Gun on bullet and
Reaction F is = bullet on Gun
No sis, force opposite direction me lg rha hai
That's why ye negative ka sign lga hai
1:33:17 be like chot lagi hai usse fir kyu mehsus mujhe horha😂😂
Watching now, teacher will start this chapter after summer vacation
Bro sameee
I recommend to complete the chapter
Sir mai abhi 11th mai aya hu aur maine ye video apni 9th mai bhi dekhi but maine PCM li hai to ek baar 9th ke concept revise kr rha 2x speed mai kyuki 11th mai max concept link hote hai 9th se
Yess me too
Rest
Same
Hlo 😅
Me too
Negative sign of force say the force which exert opposite to the direction of moving body
Thai is known as force of friction❤
NEWTON'S 4TH LAW: Every book continues to be at rest and covered with dust until and unless internal or external exam appears. And the speed of turning pages is directly proportional to the syllabus to be completed. But the tension remains constant
Bhai physics wala ka sab se best teacher thanks Sir ❤❤
1:23:17 beacuse the body is deacclerating which means the body is coming from final to initial position from which the speed is decreasing ❤
Bhai thoda precise me smjha de pls😢
1:23:35 because the negative sign only show that the velocity of object is decreasing which we denote it by retardation.
And also it's direction
Retardation
@@ishansinha2614 yes
What nonsense negative sign denotes the direction is west according to cartesian plane
@@irfankathat7920 here no one said the direction to east lol 😆
Thankyou so much sir 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
sir maza aata hai physics mai 8th mai hi paadh raha hun baas yaah lagta hah ki app jaase teacher school mai ho na to aasa ho nehi sakta ki phisics mai kisi ka intrest na ban paay PW and you are best thanku
30:05 papa na bola chup chap padh le .😂😂😂😂😂
Sir lagta hai Newton sir ne bhi aap se hi padhai ki thi 😊😊😊
Sir itne old hai ?😂
I'm in 11 class and I am warning all 9th class student to do 9th class physics serousily.
For physics rakshak sir is best❤❤❤
1:24:58 reminds me of porsche car accident... #real life example.
Newton's 4th law says that every book continue to be in rest until and unless internal or external exam appears and speed of page turning is directly proportional to the syllabus to be covered and tension in the mind remains constant.
'
👏👏👏
😢😂😂😂😢😢😢
😂
Agar ye comment rakshak sir ne padh liya to tad tad tad tad 🤫😂😁😁😂
1:23:39 because momenteum is vector quantiry jisme direction chahiye toh direcrion batane kai liye - sign laga hai it means ki break ka jo force hai vo 7500 hai air pichw ki dirwction mai hai
1:35:00 pw teacher are very nice teacher ❤
#Mere #papa# na #bola# #20# salka experience hai driving ka or tui nahi samja gha😁😀 ba ta
👌
No words to explain this wonderful teacher....😌
Absolutely Right
Yessss
Really the best teacher for physics.
Hindi me likh le ...
Iss desh India me sab sale namune he 😂
@@nkmotivation12 इतना ही शौक है हिंदी भाषा का समर्थन करने का तो हिंदी लिपि देवनागरी का प्रयोग कीजिए ।
Minus sign before force indicates that force is applied in opposite direction in which the body is moving(like it is a frictional force stoping the vehicle)
Hiiiiiiiiiiiiiiiiiiiiii
❤
i meet with Rakshak sir and take a selfie with him he is very nice and polite 😃
The force was negative because the force exerted by the brakes was in opposite direction thus,
the answer we got was in "-".
"-"
1:23:32
The subtraction/minus sign is there to denote the negative acceleration or retardation due to the breaking force applied on the ca
Thx bro were confused here
😊
❤
no problem bro
@@riyavishwakarma9886
We can also say that the - sign represents the force exterted by the brakes which is 7500N but as it is in opp velocity in relation to the body it is denoted as - if the movement of body is denoted as - then the force exterted by breaks will be in positive the - represents the direction of force here
Momentum is denoted by "p" bcs
P = pain and large momentum gives us a large pain
🤣🤣🤣🤣🤣
Hmm... right....
Anyone who is watching in August 2024 at last month nearest halfyearly exams 😅
यदि कोई गेंद किसी तिरछी सतह पर है और आप उसे छोड़ देते हैं तो गुरुत्वाकर्षण उसे ढलान पर लुढ़कने पर मजबूर कर देगा, इसमें जड़ता है और यदि ढलान के नीचे एक समतल क्षेत्र है तो वह चलती रहेगी।
Ist time I see a video in which I am not tired... Thanks PW for understanding me this chapter.. 😊
Sir you are the best teacher of physics 🙂. In other words you are king 👑👑 of physics
49:35
1:23:23 the answer came in negative because the force was braking or backward force
Answer of force is in minus because force is applies backward to vehicle