Gravitation 01 | Universal Law of Gravitation | Class 9 | NCERT | Sprint
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- Опубліковано 19 вер 2024
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🗓️ Scheduled Syllabus For Sprint ( Class 9th ) released describing which topics will be taught for how many days.
Available at PhysicsWallah App :bit.ly/2SHIPW6
•Duration:-1 month (Jan 2021 - Feb 2021)
🎉 Free Batch Exclusive on our UA-cam Channel : Physics Wallah Foundation - 9 & 10
•Batch Details :
1) Best Faculties across India for different Subject/Topics.
2) Complete & Relevant Syllabus Coverage of Class 9th within 1 Month - Fastrack January 4,2021- February 15,2021
3) Monday - Saturday : Scheduled Classes everyday.
•Physics : Tuesday, Saturday
•Chemistry : Wednesday , Friday
•Mathematics : Monday, Wednesday, Friday
•Biology : Wednesday , Thursday , Saturday
•S.ST : Tuesday, Thursday, Saturday, Sunday
4) Scheduled Syllabus released describing which topics will be taught for how many days.
Available at PhysicsWallah App :bit.ly/2SHIPW6
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❤️ Padhai Karte Rahe, All The Very Best 👍
Lol
Sir Challenger question ka answer hai step by step:
1:F'=2F.
2(i):F=F'/4 and 2(ii):F=F'/9.
3:F=4F'.
Sir live study kara do please 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
@@himanshuyadav1247 menti sangram coming on 14 aug @6pm sur would live and team rakshak sir would win!!!
@@himanshuyadav1247bhai. Sahab MATLAB kya he apka
Newtons 4th law of motion :-
A book remains in the state of rest and covered with dust until and unless internal and external exams appeared and then the speed of turning pages is directly proportional to the syllabus covered and the tension in the mind remains constant
Wah kitne tejaswi log hai yaha pe
This law is better than Newton's law.
Aj ke newton bro tumhe toh apple girne time rehna chahiye tha newton ki jagah toh to mein soch bhi nahi sakti kaise kaise law bante 🤣
@@18-kamyapatelviii-c79 sorry but don't say anything wrong about isaac Newton or any other scientist he struggle very hard for that law you can't imagine.
@@tansviutane3054 Oh I am not saying this is wrong but in new edition of class 9 science there it is written.And sorry if you didn't got me.
Challenger questions:
1) Force will be doubled
2) If distance is doubled, force = F/4
If distance is tripled, force = F/9
3) Force will be 4 times the initial force
Amazing lecture!❤
Exactly write answers
Bro kaise banaya batana jara
Mere ko bhi Janna hai
What is friction
Please full solution type kar do , your answer is double and my answer is 4 times , how
air also has gravity as particles present in air have mass and every object which has its own mass has gravity too👍
Edited
Sir please app chemistry k video bane for class ninth please air my request accept you sir
Answer of challenger:
a)F gets doubled when mass of one object is doubled.
b)F becomes 1/4 of previous force when doubled.
F becomes 1/9 of previous force when tripled.
c)F becomes 4 times of previous force when masses of both bodies are doubled.
LOVED THE SESSION!
Right
I think these Q are quite easy.
a
Same answer corrct
Right bro but I did it orally
😀
challenger questions:-
1.ans= The force between two objects is also doubled, if one of it doubled.
2.ans= If the distance between two objects doubled and tripled, so the force between two objects is decreases.
3.ans= if the masses between two objects are doubled so the force also increases.
Great Lecture!!!!
Wah dear Badi intelligent ho ❤
I like the Teaching as You explain in Hindi...Students know English Very Well but still we catch Concept more Readily While Learning In Hindi...That's Why I like This Foundation more Than Bhedantu and Gunacademy...
V'n!n;mm;m
🤣🤣🤣🤣🤣gunacademy and bhedantu
Bhi tu free fire khelte he ky
😂 op
Hiii bro
Sir session bahot accha tha.
Ya bro
Yes bro
yes bro
This was my first youtube lecture of physics wallah foundation and I love it. Thank you sir for making this amazing video and make us understand this concept.
Mera bhi
Me too
Me too
mine too
Yes me too
Sir's pen is the best example of every chapter 😂
🤣🤣😂😂
😂😂😂😜
🤣🤣🤣
Sir give best examples with pen
Adbhut
Sir I want you as my teacher in our school for physics
@@anandpatel3192 gajab 😂👌
Kuchh bhi ye sir tumhare liye especially nahi aayenge padhane ke liye 😆😆
Bro your expectations is big but never come true
@@artigupta1780 👍
Then nobody will fail in science
Sir Hume school me samjaya nahi, sirf ratta marvaya jata hai . Mam ko verbally Hindi me answer do to bolti hai English mein chahiye .sir pehle mujhe physics se nafrat thi lekin jab se aap padhate ho tab se physics mujhe pasand aane lagi
Sir physics wallah ko apni ek school khol leni chahiye jaha pe bacho ko robot jaisa nahi insano jaisa treat Kiya jaye
𝒂𝒂𝒑 𝒌𝒂𝒉𝒂 𝒔𝒆 𝒉𝒐𝒐
Challanger Question Ans.
1) Force will be twice
2)Force will be (i)1/4 of previous value...(ii) 1/9 of previous value..
3)Force will be 4 times.....
Thank you sir for great explaination😊😊
How you get the answer please reply
Challanger question
1:- F=G.M1.M2/r².....(1)
F=G.2M.M2/r².......(2)
By dividing eqn 2 by 1
F¹/F=G.2M.M2/r²/G.M1.M2/r²
F¹=2F. Answer
U r live in aayodhya
Very Nice Explanation Sir, pls bring the deleted part also of this chapter
Really nice teaching
Me tooo
What's with the deleted part ?
i have a doubt,
That how can you say that if earth attracts moon with a force than the moon attracts the earth with the same force because more will be the mass more will be the force
@@raoyadav7635 Bruh, when you talk about Gravitational Force, you have the formula F=Gm1m2/r². Basically m1 and m2 are the masses of the two objects b/w which you are finding the gravitational force, so be it Force on earth due to moon or on moon due to earth, it will remain the same. If we talk about the direction, then both the forces act on the opposite bodies. As the mass of moon is less than that of earth, we can see the impact only on moon, but in reality both of them attract each other.
Thanks to Alakh sir for choosing the great teachers for us.
Yes
According to Newton's second law of motion, the force acting on an object is equal to its mass multiplied by its acceleration (F=ma). Therefore, if the mass of one object is double, the force between the two objects will also double.
Challenger question's answer :
1. It will be twice.
2.1/4 of the previous in double and 1/9in triple .
3. 4 times more.
Kon kon mere sath h ki agar us time Newton ke sir per apple nhi girta to aaj ye gravity nhi pdhni padti please vote for this 😂😂😂😂😂😂😢😢😢😅😅😅😅😅😂😂😂😂😂😂
Apple ki jagah nariyal girna chahiye tha direct upar 😂
😂
Best explanation by best teacher !!💐💐
Yes ❤👍👍
True
yes
Very nice and god bless you
Yes
8:35 - Yes, air will also have gravity because it has mass .
Yes sir air will also have gravity because it has mass
No there is no gravity in air
No because if you weight a balloon with 0 air then weight the balloon which has air in it this will be same
Hmm...this is a topic to think!!
There is no gravity in the air
Challengers question
1) 2 times
2) 1/4 times and 1/9 times
3) 4 times
Sir aapki Physics, biology aur geography bahut achhi hai
Always try to give extra information..... Thanku so much sir🙏🙏🙏
Homework questions -
Q.1) force of attraction becomes double of the previous force.
Q.2) force of attraction becomes 1/4th of the previous force(when distance is doubled) and force of attraction becomes 1/9th of the previous force(when distance is tripled).
Q.3) force of attraction becomes 4 times of the previous force.
Thank you sir for this wonderful session😊
Love you sir ❤
Same answer thanks😊
Sir you teaches very nice 👍👍👍👍and thanks alot for the video🎥🥰🥰🥰 sir you are the best👍💯👍💯
Hii
Your teaching is so good as compare to other teachers ❤️
Thank you
Don't compare!
Don't compare
Thank you
All R best
3:06 newton was sitting in his home and watched the tree of apple and a apple fall from tree. Newton thought that why this apple fall only downside, why it's not going upside or in any other direction. Then he discovered the *GRAVITY* . This was written in his *DOCUMENTARY* .
5 minutes ke incident se itna bada universal law nahi baan gaya khud physics wallah alak pandey ne kha hai
@@taradevi5913 he was working on gravity for a very long time. After this incident may be he got am inspiration or an idea?
@@krishna290gamer2 exactly that's what I was saying he was working on it for a very long time
@@krishna290gamer2 you are in 10th now
Bhai log tum sahi keh rahe ho sirf apple girne se koi itni badi discovery nahi kar sakta iske peeche bahut saalon ki mehnat hai nahi to hum bhi patang ko udhta dekhke **upravity** bana dete
Sir physics wallah ko apni ek school khol leni chahiye jaha pe bacho ko robot jaisa nahi ,insano jaisa treat Kiya jaye, ratta nahi samjhaya jaye
Please sir alakh sir ko schools kholne ka idea zaroor dijiye
Aur pune mein khaskar kholna near Hadapsar
8:45 Yes sir air me bhi gravity h
𝙋𝙡𝙚𝙖𝙨𝙚 𝙨𝙪𝙗𝙨𝙘𝙧𝙞𝙗𝙚 𝙢𝙚
(i) F'= 2F
(ii)If distance are doubled
F'=1/4F.
If distance are tripled
F'=1/9rF
(iii)F'=4F
Answers of the homework questions.Thanks sir for the best explanation.My all doubts are clear in this video.🙏🙏🙏🙏🙏
Challenger questions 44:03
Q1 I) Force will become 2 times greater than previous Force
II) Forced will become F/4 and F/9 times
III) force will become 4 times greater
BaHi mujhe samjhao kasy
Are you fool you don't know how to do this 😠😠 khud try kar
Any one noticed that _kar bhala to ho bhala _Newtown 🥉 law😂😂🎉
Kya bhai yi Kya hai
😅😅😅
Challenger question
1:- force become twice
2:- 1/4 of the previous and 1/9 of the previous
3:- it becomes 4 times
Yes
Finally I found a navodayan 😂🤣
@@Renubala07 that's good 😂
@@harshichaudhary1021 wahh!!
@@spgamer3389 🤘
The hallo bachhoooooooooo is so good 0:01😂😂😅
Thankyou so much sir this video helped me so much 🙏best teacher I have ever seen🙏🙏thankyou for your teaching sir 🙏🙏🙏I appreciate your teaching 🙏
Ek apple 🍎🍎 ne zindgi barbaad kr di 😭😭😭😭🥺
Funny😂
But hamare liya zaruri b tha 😂😂😂 apple k Bina zayada tym lagta solve krna 😊😊
Apple chahie 😂
Baat to sahi hai😂
Sahi baat hai
Do you Know when you will slow the speed of this vedio at the rate of 0.25x on 43:47 you listen 🎶 sir speak like a alcoholic sir try it please it is only fun don't take it seriously ok
😂
*ayoooooooooooooo*
44:02 # Challenges question
(I) The force will become doubled
(2) A) when doubled force will become 4 times
(2)B) when tripled force will become 9 times
(3) The force will become 4 times
Thank 🙏🙏you sir
Maza aaya
When doubled force will be 1/4 if previous F
And when trippled force will be 1/9 of previous F
Sir your are the best teacher ❤
Yeah
*Challenger Questions -:*
Q. What happens to the force between two objects, if
1) the mass of one object is doubled ?
*Sol-:*
F = G×M1×M2/r².....(1)
F⁰= G×M1× 2M2/r².......(2)
Dividing eqⁿ 2 by 1 . Then,
F⁰/F = G×M1×2M2/r² ÷ G×M1×M2/r²
F⁰/F = 2/1
F⁰= 2F
The force will be twice if the mass of one object will doubled.
2) (I) the distance between the object is doubled.
*Sol-:*
F= G×MI×M2/r².......(1)
F⁰= G×M1×M2/4r².......(2)
Dividing eqⁿ 2 by 1.Then,
F⁰/F = G×M1×M2/4r² ÷ G×M1×M2/r²
F⁰/F = 1/4
F⁰ = F/4
The first become one fourth if it's distance doubled.
(II) the distance between the object is tripled.
*Sol-:*
F=G×M1×M2/r².....(1)
F⁰=G×M1×M2/9r²........(2)
Dividing eqⁿ (2) by (1).Then,
F⁰/F = G×M1×M2/9r² ÷ G×M1×M2/r²
F⁰/F = 1/9
F⁰= F/9
The force will be one-ninth if the distance will tripled.
3) the masses of both objects are doubled?
*Sol-:*
F = G×M1×M2/r².........(1)
F⁰= G×2×M1×2×M2/r²......(2)
Dividing eqⁿ (2) by (1).Then,
F⁰/F = G×2×M1×2×M2/r2 ÷ G×M1×M2/r²
F⁰/F = 4/1
F⁰ = 4F
The force will be 4 times if the mass of both two objects are doubled.
Hope ! This is correct 🥰🥰🥰🥰.
Lekin devide kiun karu substraction Kar ke nehi hoge keya ?
Please tell me why🙏🙏
One of the best teacher of physics I have ever got❤️❤️❤️
Your are best teacher and I love yr teacher style👍
Newton ke upr agr apple gira tha to uthaa ke khaa leta, experiment krne ki kya jrurt thi 😟😒😔
Challenger Questions:-
(1) Fn=2F
(2)(i) Fn =F/4
(ii) Fn = F/9
(3) Fn =4F
Hello 😍😘
@@studypagal8120 bolo behena
Hlo
@@studypagal8120hlo😊
@@rajibsinghasingha5100😍
8:46 Yes sir Air have Gravity and Gravitational force both because Air is made up of fine particles and all particles have some mass.
Can you explain more?
@@Gamma_plays you will know when you will read the chapter atoms and molecules. In that chapter the mass of gases(air) are given . Hence we know that air have mass and sir had told that anything that have mass have gravity.
Sir aap konse state/city se padha rhe ho
3:06 sir mujhe to lagta hai nhi gira hoga ... Bas Newton ne diya hoga gravity ka ... Kyuki agar sach me girta to vo gravity ke bare me nhi sochta seb uthata khata aur ghar ja ke so jata ....😂
Lmao
Grt lecture sir...
👍🏻👍🏻
THANK U SIR
Even paid clases won't teach us like this......❤️
Thnku sir 😊
Apple did not fall on Newton's head it was just observed by him falling
Rakshak Sir Op 🔥🔥🔥🔥🔥
8:37 yes sir Air mein bhi gravity because air mein small particles hote h unme bhi Mass hota h issiliye Air mein bhi gravity hoti h
😊😊
𝙋𝙡𝙚𝙖𝙨𝙚 𝙨𝙪𝙗𝙨𝙘𝙧𝙞𝙗𝙚 𝙢𝙚
Physics wallah foundation is the best for students on whole u tube world for study with enjoy......🥰🥰🥰
1.i) 2times of the previous force
ii) doubled - 1/4 of previous force
Tripled - 1/9 of previous force
iii) 4times of previous force
.
How you get the answer please reply
Best Science teacher in online platform
Challenger Answers :-
1. New force is 2 times the older one.
2. ☆ New force is 1/4th the older one.
☆New force is 1/9th the older one.
3. The new force is 4 times the older one.
Adbhut hai Sir aap.
Thanks
Challenger question:
1. Let, Mass of 1 object be doubled=2M
New force =G ×2Mm/d²
=2×old force
If the mass of one object is double the foce is also doubled.
2.If the distance is doubled, distance=2d
Then,
F=GMm/(2d)²
=GMm/4r²
=1/4×old force
When the distance is doubled the force becomes 1/4 times of the old.
3. if the distance is tripled, distance =3d
Then,
F=GMm/(3d)²
=GMm/9d²
=1/9 ×old force
When the distance is tripled the force becomes 1/9 times of old force.
Amazing
No sis that is not like that
Thank you sir pura lecture samajh me a gaya🥰🥰🙏🙏
Mughe bhe
ati sundar sir jee
;
;
;
;;
thanks for pw
Sir u are a great teacher!!!!
Who all agree like
9:31 Best part ❤️
Maa ne hath pakra hua h esliye mai kahi jaa nhi paa rha that's one
Op sir you are really a good teacher in the whole team of sprint batch. Your teaching style like gravity which attracts me alot all time.
THANK YOU SIR FOR PUTTING YOUR VALUABLE EFFORTS AND TIME.😊
THANK YOU ALAKH SIR 😊
𝙾𝚘𝚒
Yes thank yoi sir
@@SangitaKumari-iu1ot hi
This is not alakh sir bro 😁
Aisa kuch nahi hai normal teacher he hai ye
Sir you are the best physics teacher in our world ❣️❣️❣️❣️❣️❣️❣️❣️
11:45 1)moon revolve because of earth
2)Eart because of sun
3)Sun (soler system) because of supermassive black hole in center of gallexy
4)and gallexy because of center of the mass of gallexy cluster
9:50
Answer of challenger questions.
1. F' = 2F.
2. F'= 1/4 F.
F' = 1/9 F.
3. F' = 4F.
Love u all....u all are great
Koniciwa
Yes sir air also have gravitation even an all the partical has the gravitational force between them and sir that's why radon is heaviest gas so it is at the lowest level of the ground and hydrogen is the lightest so it is at the top.
Do air have mass ?
I think it has
@@premsudhasingh6253 gas has molar mass
OP level bhai OP
But what about mass??
I never seen such great teachers 😊😊
Than now you can see in UA-cam▶️
Hlo
Yes sir ,Gravity is present in air also. That's why in the lower height pressure is higher and as we go higher the air pressure goes on decrease
Han theek gyaan na baanto 😂
Galat uttar
Becoz of one apple 🍎 we are studying a huge tricky chapter
No sir this is not true that an apple fall on head of Newtown baba....... because alakh sir had told in a lecture that it is not trueee......🙂🙂
@AYUSH ÑÈGI 3 Thanks a lot
@@ashmitamishra1480 Watch Magnet Brains for real story
@@DhruvSharma-ov5xu okkk bhaiii
Yes sir , Air is applying force on us which is opposite to the gravitational force.
Can you examplain more please
2. If the distance between them is double then the force becomes 1/4 of the previous force . And if the distance between them is triple then the force becomes 1/9 of the previous force.
No wrong check out my answers
Kas hamare school me bhi aap jaise teacher hote to padhne me maja hi kuchh alag rahta
Kepler's law padha diziye sir
Rakshak sir is the best physics teacher.🙏🙏🙏👍👍
Sir after seeing your video physics became my favorite subject 😊😊. THANK YOU SO MUCH
Sachme....waah..!!
One more question
How can the heart be strong enough to pump blood up your legs against gravity?
Because of the valves, the blood can only move in one direction as it gets squeezed along. So it is a combination of blood pressure from the heart's pumping action, the valves, and muscle movement that gets the blood up the legs against gravity.
@@DARK-0007 yep bro right....
37:15 funniest motion 😂😂
Edit-Thanks for 1k like❤️❤️😘😘
Q1 I) Force will become 2 times greater than previous Force
II) Forced will become F/4 and F/9 times
III) force will become 4 times greater
Challenger answer
1: if force was F previously it becomes 2F.
2: force will be F/4 and F/9.
3: force will be 4F
𝙋𝙡𝙚𝙖𝙨𝙚 𝙨𝙪𝙗𝙨𝙘𝙧𝙞𝙗𝙚 𝙢𝙚
Thanku so much sir.. You have great teaching style..🤗🙂🙂 I was dull in physics but because of you now I love physics and I have decided to take PCM after 10th..🤠🤠
PCB
phy chem bio
PCM
Take social science
Math is devil
Sir I have a request to all physics wallah platform not to remove any topics from any chapter because not in every school not that topic is removed and children will read these lectures after some years so please don't remove it or if you remove it also then when you get free time then upload it..🙏🙏
Yes
Fantastic class. I am a teacher of history but I realise this topic fluently.
36:11 , when 6.4 and 6.7 were canceled, all that's left is 60/6.4, which comes out to be 9.3, not 9.8, so that cancellation can't be done in the exam and the whole tedious calculation is required.
My answer for this question is coming 6.25 x 10^7 as I took the value of G as 6.67 x 10^-11.. I think their is some mistake in the calculation that sir did. I even rechecked my answer but it was coming same. Pls try it once by putting G=6.67 x 10^-11 and let me know the answer..
you share the same name as me lol
8:45 Yes sir
As you told that mass is required and air has negligible mass
Noo
No .. Because air is considered as matter
.... So air have occupies space and also have mass
Sir you are a great teacher.💘💘💘💘
44:00 (1) the force becomes 2 times when the mass of one object is doubled
(2)the force becomes one-forth times when the distance between doubled and the force becomes one - ninth times when distance between object is tripled.
(3) the force becomes 4 times when the mass of both object is doubled.
😊
The second is tricky
@@sufferesthumanbeing1926 no it is not tricky you can also learn the 2 answer in another way that is the force becomes 4 times less when distance between both of object will double
And the force become 9 times less when the distance between the objects will tripled
Ok
Mtlb phone mai sabse zada gravitational force hai 😂
Nhi bhai bus Instagram me hai 😂😂
Ha
Kaun kaun Saal bhr na padhker exam se ake din phele mobile se padhker pure chapter ko tyaar kerte hii... 😂😂😂
Tu pagal hai bhai
No.1 ka pagal hai tu
bhai maine
Bhai exam se 2 ghnte pehle padhra hu😂😂
Baad ka result bhi bta do 😂
Amazing explanation sir.....
Thank you so much....
sir your teaching is so good but sometimes we watch your videos to learn how to simplify bigger digits(the last part of every question). it would be so helpful if you will simplify it too.
I think this lesson is so hard, but I see your vidio my mind is changed now, I am thik this chapter is so interesting. 📚🤗
Sir just because of you physics is my favourite subject now..😊😊
omfoo
Mine also
Areh bhai bhai😹👍
Our rakshak sir should be known as the father of Physics ❤️
Literally!!!.... Only because of him I can make my concepts a much more better than b4.... He's d best😍😍..... No one can ever replace him ❤.... I don't know totally but whatever I know by my perspective He is the BEstEst Teacher of pHySICs 👺👺 Earlier my physics was not like that better.. But now I just topped in PhYsIcs..... LITERALLY AN AMAZING TEACHER , MENTOR AND everYThiNG!!!!❤❤❤❤❤❤
👍👍🙏
You are ajay bhai
36:38
No no bro the father of physics is alakh sir just see his old videos they are like gems💫❣❣❣❣🌹🌹🌹❤❤❤❤❤
Challenger questions answer----
1.a) force will be double from actual force.
b)in 1st case force will be 1/4 of actual force and in 2nd case force will be 1/9 of actual force
c)force will be 4 times larger than actual force.
Thanking you
The moment when sir gives us extra knowledge which i love to have and then says kher chodo bade level ki bate hai and then leave that topic which i was actually able to learn pisses me off sir dont underestimate us
Some children might get confused so thatswhy he do so
Fukkri Mt maar 🤯🤯🙄
Sir tumko underestimate kyu krenge but instead u people underestimate him 🤯 jitni knowledge di h utni rkho
sir you are a very nice teacher....keep going nd bring us fantastic videos like this oftenly
Best teaching ever I had seen ; before some months when I hadn't found this channel I was very weak in physics but now I had got full marks in physics due to PHYSICS WALLAH platform ...A very special thanks to ALAKH SIR and PHYSICS WALLAH TEAM •••.
*🧐DOUBT⁉️⬇️*
As the universal law of gravitation says that it directly depends on the masses it implies that a man of mass 60 kg will get more attracted towards earth than a boy of mass 25 kg ?
(Answer If You Know)⬇️
Rakshak sir OPIPOPOPOPPOPOP
@@pranavpratik. Both will be attracted toward the earth at the same speed as their air resistance present on the earth so it cannot be possible on the earth but if we make a vacuum then we can prove this experiment.
@@pranavpratik. both will be attracted with different speeds heavier man will be attracted faster compared to the lighter man....but in case of vacuum , law of gravitation won't apply, so the speed will be same for both the heavy and the light man
@@MrAtif-sk1hj sorry check your answer on earth air resistance is different at different places depending on relief features, air molecules, water molecules, clouds, density and other particles such as dust particles !!