GRAVITATION in One Shot - From Zero to Hero || Class 9th
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- Опубликовано: 31 июл 2024
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👉 Complete Chapter Gravitation 👉 • Science || Chapter 10 ...
Timestamps
0:00-2:00 :- Introduction
2:00-15:25 :- Universal Law of Gravitation
15:26- 30:18 Finding SI unit of G
30:19 - 41:22 Applications of ULG : Daily Life
41:23 - 47:45 :- Acceleration due to gravity (g)
47:47- 1:06:07 :- Deriving the formula of g + Questions
1:06:09 1:09:55 : Variation in'g'due to shape
1:09:56 - 1:18:10 :- Difference between 'G' and 'g' plus Questions
1:18:11 - 1:19:41:- Free fall : The Concept
1:19:42- 1:24:49 :- Free fall numerical (Downward motion)
1:24:50 1:25:03 : Free fall numerical (Upward motion)
1:25:04 - 1:33:48 :- Mass/ weight plus Questions
1:33:49 - 1:40: 24 :- Kepler's law of planetary motion
1:40:25 - 1:42:43:- Thrust
1:42:44 - 1:47:53 :- Pressure
1:47:54 - 2:02:57 :- Example of pressure plus Questions
2:02:58 - 2:09:08 :- Pressure in fluids
2:09:09 - 2:14:38 :- Buoyant force
2:14:38 - 2:21:27 :- Archimedes principle
----------------------------------------------------------------------------------------------------------------------
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#Gravitation #Science #PhysicsWallahFoundation #Physics #Class9th #PhysicsWallah #Class9thScience #Class9thPhysics #ZerotoHero #Class9 #NCERT #CBSE #OneShot
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Best lecture of all time
Sir I Have a DoubtQues plz clear which is easy pull or push?
Plz give answer
@@NishaSingh-ni8gd physics wallah webseries dekh ka aayo ho madam
Sir moon ka bhi to mass hai par phir bhi usme gravity kyo nahi hai ?
@@NishaSingh-ni8gd it is easy to push or pull it depends on the mass of the body if the mass of body is less than the body which is applying the force then it is easier to pull but if the body has greater mass than it is easier to push the object.
😂Students law of tension,
Pressure is inversely proportional
To the number of days left for the
Exam, where ( kal se padhenge
Remain constant) 😂😂
Are bhai😂
Oo padh le na
Clever 😂😂😂😂
bhai tu 9th class me nhi he😂🤣🤣😂
To fir Thrust ka Formula kya hoga 😂😂😂
Anyone of class 9th session 2024-25
Like please
👇👇🏻👇🏻👇🏻👇🏻
Par sir k...kuch Samaja nahi a rha h
00-2:00 :- Introduction
2:00-15:25 :- Universal Law of Gravitation
15:26- 30:18 Finding SI unit of G
30:19 - 41:22 Applications of ULG : Daily Life
41:23 - 47:45 :- Acceleration due to gravity (g)
47:47- 1:06:07 :- Deriving the formula of g + Questions
1:06:09 1:09:55 : Variation in'g'due to shape
1:09:56 - 1:18:10 :- Difference between 'G' and 'g' plus Questions
1:18:11 - 1:19:41:- Free fall : The Concept
1:19:42- 1:24:49 :- Free fall numerical (Downward motion)
1:24:50 1:25:03 : Free fall numerical (Upward motion)
1:25:04 - 1:33:48 :- Mass/ weight plus Questions
1:33:49 - 1:40: 24 :- Kepler's law of planetary motion
1:40:25 - 1:42:43:- Thrust
1:42:44 - 1:47:53 :- Pressure
1:47:54 - 2:02:57 :- Example of pressure plus Questions
2:02:58 - 2:09:08 :- Pressure in fluids
2:09:09 - 2:14:38 :- Buoyant force
2:14:38 - 2:21:27 :- Archimedes principle
1:40:24
Thank you
42:10
Thank you
Hum bhi description dekhte hain😂
FOURTH LAW OF MOTION:-
Every book remains at the state of rest until and unless any external or internal exams appear, and then the speed of turning pages will be directly proportional to the amount of syllabus to be completed in time and the tension in mind remains constant...
Edit- Bhai Bhai Itne Likes...
Future scientist spotted☠️
Ye Scientist Isro me jayega
😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
🤣🤣
@@user-do6ii6bh7l ISRO❎ BSRO✅.....Bharat Space Research Organisation ......👀
Kash Newton 😅pay pura tree gir jata gravity padhne nhi Parti😂😂
Edit:- itne likes 🙃 so beautiful ✨so elegant 😍 just looking like a wow 😳
Kash aap aate hi nhi aapko padhne k jarurat nhi prti 😅@crafy18210
Bhai bhut sahi😂😂
@@YogibabaUttarPradesh Thanks bro
@@user-jx9ys7th7tkash tu na birth nahi liya huta tara comment padna nahi padta😂
Kya😂😂😂😂 baat ha
41:11
1st: Force becomes 1/9 times of that its previous value.
2nd: Force becomes 4 times of that its previous value.
3rd : Force becomes 8 times of that its previous value .
can i ask why did you write 1/9 instead of Gm1m2/9 ?
@@figureyourticketwait what how?
@@dahlia_orchids_vins bruh 😭 can you explain how yall getting 1/9 for the first question? though today was my science exam
@@figureyourticket yeah hold up
We know that ;
F = GMm/r^2 or you can say? M1M2 ya know
Now;
F`= GMm/(3r) ^2
F`= GMm/9r^2
F`= 1/9 GMm/r^2
F`= 1/9F
Square of 3 is 9 and it's sign is positive when it's in devision but when to take it from division to multiplication then it becomes negative to remove that sign of negative you reciprocal it so it becomes 1/9 so it goes from -9 to 1/9
@@dahlia_orchids_vins ohhh alright alright, thank you
कौन-कौन Hai Jisne 9th Mein Na Koi coaching ki ya nahin Koi tuition
Me
Matlab Ki koi coaching nahi karta main
Me
Me
Me
Kinhe physics bhut achha lgta hai or samajh bhi aata but baad mein bhool jaata he😂
Best Physics Teacher I Have ever studied with , my school teacher used to scare us from physics but this teacher made physics so easy and fun . Salute to Your amazing Teaching Skill......
Hnhnh baat toh ! Sahi hai !
Hnnn bhai❤
😊
Yesss sahi hai
Yeppp
JUST REVISING THESE CHAPTER BEFORE STARTING 11TH😄
ru taking notes alsp???
Bhai main to dropper 😢hoon
So, this means that we couldn't understand chapters of class 11th without studying in class 9th ?
@@MonaPriya-rj4plbecause class 9 has the basics of everything you need to understand class 9 properly. Without understanding the basics it will look hard to understand the physics or any subject in class 11
@@MonaPriya-rj4plyess
❤❤❤❤❤Bheed se alag
Dhundhne apni jhalak
Tu akela chal
Dhundhne ko apni chamak
Akela hi gir akela sambhl
Ek din akela hi ho jayega tu saphal❤❤❤❤
29:36 jinko answer sahi nhi aya
Bro dekh
6.67×6=40.02 And
6.4×6.4=40.96 soo..
40.02/40.96×10
You'll get 9.77... something
Thank me later😅🎉
bro dikha
Galat hai tera
@@tuktukandbittu3270 It's definitely right 👍🏻👍🏻
Guys we are going next year in 10th so best of luck all of you ❤❤😄😄
Bye bye 9th class
2:21:58 Level of water will remain same
Reason: Because as he threw the stones in the pool the water level rises but at the same time boat will also rise upwards
Therefore, water level will remain same
Aap jaisa teacher agar hame classroom me mil jaye to ham physics ka genius ban jayenge
Ultra legends are from class 11😅
I too😂
@@JEE2026-IIT nhi bhai tere jaise bahut h
Am from 8th pro max 👽
Present sir 😂😂😂😂
besharm jakr 11wi padhlo
Dear, SIr after crack my exam almost.2026 i shall be meet you offline🙇🙇🙇🙇🙇🙇
Same with mine😇..
BTW- best of luck 🤞..
Same me
No need
@@Tusharkararia200 why!
Which exam you crack 🤔
Best life lesson :agr khud ki khoj krni h to akela hona hi pdega 💯
😂😂 annual exam start in September 😢😢😢😢 full taiyari ke sath
Kash Newton ke uper apple nahi nuclear bomb gira hota physics wohi par khamtam ho jati.😂😂😂
Hmm kya maza aata hai phr physics k bagar 😂🤣🤣
Par pir physics
memaje nahi
aata par pirbe
girna chaiye da
Bhai tum dono ko hindi likhna nhi aata
@@nikkisingh4114 shyad
Bhai aur bhi scientist hai physics me kabhi quantum mechanism ka naam suna hai 😂
11 th Wale attendance lagao Jo aapna basic strong karne aaye hai
Me
Me
Me
Me
Not me
This man proove that physics is not boring 😢😅😊
Agr esa schl teachers ne pdha diya hota to ab 11th m 9th ka nhi pdh rhi hoti 🥲
aur mai 12 th k baad na padh rha hota .
Same yaar
Ha sahi kha 😢😢
Same yaar hm v 11th me aakr 9 ka pdh rhe😢
Mai bhi 11 the aake 9 ka revision kr rha hu 😊😊 matlab ki mai akela nhi hu 😅😅
41:13
(i) Force will become 9 times lesser than previous value
(ii) Force will become 4 times more than previous value
(iii) Force will become 8 times more than previous value
2:21:50
Water level of pond rises
No change 🤔🤔
it does not change since the rocks are in the boat which is in water
Not change
Water level will remain same
@@MSDHONI7.O7 The water level will decrease. While it's in the boat, the stone is displacing a volume of water whose weight is equal to the stone's weight. But when the stone is sunk, it's displacing a volume of water whose volume is equal to the stone's volume.
40:00 i) Force reduced by 9 times
ii) Force becomes 4 times
iii) Force becomes 8 times
53:08- i got my energy back in 1 minute
Same me
3rd is wrong
@@studiesandfunwithsuhanishu5071 i think it's wrong...
@@rameshwarharne5073 me too
Same
KON KON 11TH SHURU KARNE SE PHLE DEKH RHA HAI
Today is my exam at 12:00 clock legends are reading before exam.😂
0:01
Pov: Earphones with full volume
2:23:38 Answer - the water level will be same
2023. 24 vale bacho attendance here 😂
1:24:49
[i] maximum height will be 31.25 m
[ii] the time will be 2.5 sec
explanation:
u= 25m/s
t= t
s= s
a= -10m/s^2
v= 0
first we will find time by v = at + u
> 0 = (-10)t + (25)
> -25 = -10t
> 2.5 sec = t
now we will find the distance so just use 2as = v^2 - u^2
2:23:05
Answer :-
The level of water remains same
Hmare class me pura physics chapter khtm ho gya lekin kuch smjh nhi aaya lekin pta nhi yha kya magic hai ki pura smjh aa gya ❣️. Aaj smjh aa gya power of P.W 🙂.
An object is projected upward with a velocity of 25m/s
U = 25m/s
T = ??
S = ??
A = -10
V = 0
Find time
V = u + at
0= 25+(-10)(t)
0=25+(-10t)
0-25= -10t
-25= - 10t
25/10= t
T=2.5 seconds
Find displacement
2as = v² - u²
2(-10)(s)=0²- (25)²
-20s= 0- 625
-20s= -625
S= 626/20
S= 31.25 m
T= 2.5 seconds
Displacement= 31.25 metres
Galat hai total time pucha hai jaake wapas aane ka to time 2.5×2 = 5 sec hoga
Thanks
41:16
i) Sir in first case the force reduces by a factor of 9.
ii) In the second case the force increases by a factor of 4.
iii) And lastly, the force increases by a factor of 8.
39:54 1.force is become one ninth
2. Force is become four time
3. Force is become eight time
😂😂
Listen force applied will become twice not four times
2m1×2m2
Take two common and the rest of expression equals to f
India ka best physics ka teacher sach me yaar mera school ka teacher kya padha ta kuch samajh nhi aata h . Hum unse jitna bar v padh kar exam diye h mera number to gya par first time hum ye hi chapter kiye or exam me Mera number first time numerical me aaya h I know number aacha nhi h par physics me aaya bas Mera to Khushi ke mare 😊 Dil garden garden ho gya thank u soooo much sir ❤❤❤❤❤
Kis kis ki science favorite hai or apna favorite chapter batao science ka 😊
Yes.....motion
40:00 i)force reduced by 9 times
ii) forces increased by 4 times
iii) forces becomes 8 times
shouldn't it reduce by 1/9?
@@sonia9426yeah
same thing
Yes Bhai 😊😊😊
@@sonia9426 you cannot use the term “reduce” here , because the expression involves multiplication.
41:12
(1) distance tripled "1/9"
(2) both objects doubled "4"
(3) 2m1 and r/2 "8"
(1)Force becomes 1/9times it's previous value.(2)Force becomes 4times it's previous value.(3)Force become 8times it's previous value.
Yes🎉
sameee
Samee
Yeah buddy
Haaa bhai
1:24:57
maximum height-31.25m
time would be -2.5 sec🎉
g=-10m/s²
bro can you explain me how?? plzzz
Bro how can be time -2.5sec???😂😂😂😂
1:25:00 (1) maximum height achieved=31.25
(2) Time taken by the object to reach the ground again=2.5s
Hello (1) part mera answer sahi h but time kaise likalna h samajh nhi aa rha
Kaise karna h?
Dekho phly part ma jaisy formula use ki na waisy hi dusry ma b krni ha V=U+AT........... inko values do aur phr ans khud hi nklyga......... V=u+at=25=0+9.8×t
=25=9.8×t
=25÷9.8=t
=2.5=t ANS
@@Wanimmu190upward motion mei toh final velocity 0 hoti hai na
Kuch nahi bro dono me utsav banana hai 😂😂@@Kanika8822
2:23:01 the level of water will remain the same because ,the person with his boat is already in the water along with stones
can't thank you enough sir !!!! my extend my gratitude to you and this channel! you guys r the best!!!!
@kkook_youknow
No bro the water will come up because the stones will occupy the space inside the water as the level of water will increase and the boat will float at some more height
Thus , The stone will displace the water.
Wrong answer . Water will rise up as stones would occupy some space and displace the water.. this desplaced water will rise up
@@abhimudgal8117 No it will stay the same...the boat and stones are already part of the Swimming Pool...the only difference is that they have taken space inside the boat but the boat is also part of the water...so the level of water will stay the same.
Right answer .I got it in the first, it was quite easy. 😁
They both are the also part of swimming pool so when the stones thrown in downwards position so the level of water will remain same because of stones was in boat in swimming pool
Thank you so much sir for your quick revision on gravitation it helped me in my thin year cbse class 9 th annual exams 🙏🙏🙏
sir we are very lucky that you are our physics teacher. We can't understand anything by our school teacher but sir you make physics interesting.You are best ever teacher i have ever studied. Thank you so much sir. I hope you study us in class 10 and life time .
1:24:50 the acceleration must be positive...because it's in downward direction..you can even chech example 10.2 given in the ncert page 136
One of the best channels around the world.......there is a lot of respect for teachers of PW like you in our heart
Hum bhi hai
1) when the distance between the object is get tripled then F =1/9 times.
2) when the masses of both the object gets doubled then F=4 times F.
3) when the mass of one object is doubled and distance is reduced to half then F= 8 times F.
thank you sir itne maje se physics padane ke liye
Write bro
@@satyamkushwaha123 right*
Bro
1/9 keseh hoga it's 9 times
@@sahidchhetri5703bhai 1/r^2 hota hai
Imagine rakshak sir is punar janm of sir isaac newton 😂😂
40:00 I) 1/9 of previous force
II) 4 times of previous force
III) 8 times of previous force
1) Force reduced by 9 times. 2) Force becomes 4 times. 3) Force becomes 8 times
Solution please
1:24:49
(1)31.25m
(2)2.5s
Kasa aya
Right answ🎉
No bro time 2ill be 5sec as question is asking time to reach the ground so it will be 2×2.5 =5
Bro tum log kounsi value lekar solve karte ho mai to g=-9.8 m/s² lekar kar raha hu answer nahi aarha
Wrong answer
Bachhe nahi 12th karne ke baad bade bhi dubra dekh rahe hai 😅
a ball is projected from ground wth a velocity of 100 m/s find the height attained by the ball , and final velocity of the ball before striking the ground also fine time plus wht is the force exerted by the ball.if momentum is 100
Thanku so much sir ❤. It is only because of you that I can study physics and can get good grades.. we all need a teacher like you in our schools as well ..❤❤
Same to same sir
Hai
2:22:29 the water will remain the same as the stones are in boat and the weight of the boat + stone are equal when stones are thrown in water
Ya right❤❤😊
If the stones are immersed in a fluid then the water will rise, it's because of the archemedes principal
Thank you for being an inspiring physics teacher. Your passion for the subject and dedication to helping us understand complex concepts have made a profound impact on our learning journey. Your guidance has sparked curiosity and fueled our desire to explore the wonders of the universe. We are truly grateful for your commitment to shaping our scientific understanding. Thank you!
Class 11th ko start krne se pehle basics strong krne ayi hun..🤭🙂
Ham log bhi 😂
@@bestfriendgoal896 Nice..🙂
Same 😅
Same
Sir bcz of you now I'm gonna crack my science final exam easily with good marks and I had a lot of tension abt physics and specially this chapter GRAVITATION but now my all doubts are cleared after watching this video , thank you so much sir for your great explaination !🖤
Why the black heart then
@@Prakashsingh-xf4yh yes
@@Prakashsingh-xf4yh because it looks formal 🖤🖤
Bas bas rahne de
Great session sir, helped me understand a lot.
Answer to boat question:
The level of water remains the same but the level of the boat rises up
egoist isagi yoichi > Kaiser
Yes bro
2:21:31 Ans) The level of water on the pond will remain same because initially the stones are in the boat and boat along with stones in pond so no effect will be hold the water.
i am a bts army too💜💜
but i love physics too
@@KumariSupriyaVIIIERollnoBTS 'SIXERS😂'
I'm also BTS army 💜
@@kailashojha4879 🤡🤡
(1)Maximum height achieved= 31.25m
(2) time taken by the object to reach the ground again= 2.5sec
Right 👍 I also got the same ans. Isme ek doubt ho jata hai iss chapter me kaha -9.8 lena hai kaha -10
Ilove you ❤
@@vivekanandpandey4495 jb 9.8 given ho tab aur nhi given ho toh 10
The very best teacher of physics .I love your teaching and also PW ❤
2:22:43 The water level will remain same as volume is not changing in the pool , those who are thinking that it will rise due to increased in volume of water due to stones , they are wrong , because stones volume is already added in it
BTW, sir is best for physics for foundation
Bro took my mouth 's words
41:10 , The answers to the given question are:-
(i) The force decreases by 9 times
(ii) The force increases by 4 times
(iii) The force increases by 8 times
40:00:- (a) Force is reduced by 9 times
(b) force is increased by 4 times
(c) force is increased by 8 times
1:07:45:- Equator wali
1:24:49:-(i)=31.25
(ii)= 2.5m/s
i. Force of gravitation will become 1/9
ii. Force of gravitation will become 4times
iii. Force of gravitation will become 8 times
Pls explain these.. 😢😢
Same answers bro
@@chandreshkumari5736 explain this please
Same
I. F=Gm1×m2/r^2
When distance will be tripled the F=Gm1×m2/(2r)^2
Ans - F= G m1×m2/4r
= 1/9
41:13
(i) force become 1/9 times of old force.
(ii) force becomes 4 times of old force.
(iii) Force becomes 8 times of old force.
POV : when u saw too much anime😁
-when I saw force written in this comment then I thought it is written fire force😅
You are awesome sir thank you for your help to me by teaching this chapter in one shot 😊😊🎉🎉 thank you so much again🎉🎉
Sir u're best physics teacher 😊
41:14 HW question (i) F' = F/9 or Force becomes nine times less than previous force
Yes, F'= 9F
Yes (1) F=F/9
After solving MTG , I started to love physics 🔆
5TH LAW OF MOTION:-
The chappal you get is inversely proportional to the marks you get in exams
39:52
Q.1) Force between 2 objects is reduced by 9 times
Q.2) Force between 2 objects has increased by 4 times
Q.3) Force between 2 objects has increased by 8 times
Your way of teaching is great sir. I am preparing for government exams and I am revising ncert physics by watching your lecture videos. Wish I could have a teacher like you when I was in my school days😊
I Too
I too for TGT science
When the distance between the two objects is tripled then answer is 1/9 times
When the mass of the objects are doubled then answer is 4 times
When the mass of one of the body is doubled and separation is halved then answer is 8 times
41:11
1) force reduces by 9 times
2) force increased by 4 times
3) force increases by 8 times
Only legend see this video one day before the exam 😂😂
1:25:02
S= 31.25 m
T= 2.5
t=5sec
That is why I love this channel bez it has both learning and fun
It was really hilarious "Teri aur teri aur hayye Rabba 😂😂😂
time when
sir said said this
Agar time travel kar sake na toh jab newton baccha tha tabhi.....😂😂😂😂😂
Please like
Yrr kash aise hi teachers humare school mai padhte or itne achhey se samjhte thank you sir hume itna achhey se padhne ke liye aap nhi hota toh humara physics mai kya hota Thanks a lot sir😊❤️
2:22:11 the level of water will remain same as the stones' volume had already made the difference in water level when they were in the boat .So the water level will not rise
Same answer😮
Please explain
Entrance exam dena h aaj aur 9th pdh rhe h😁😂
Agr apple 🍎 ki jagah asteroid ☄️ girta to aaj gravitational chapter na banta 😂😂😅😅
41:18
force will decrease by 9
force will increase by 4
force will increase by 8
2:01:50 maja aa gya
39:57
1] 1/9 times the original value
2] 4 times the original value
3] 8 times the original value
Ist to aa gya bhai but ye 2,3 kaise banegaa
@@vivekanandpandey4495
2] F=GMm/R^2
F'=G * 2M * 2m/R^2
F'= 4 GMm/R^2
F'=4F
@@vivekanandpandey4495
3] F=GMm/R^2
F'= G * 2M * m/ (R/2)^2
F' = G * 2M * m / R^2/4
F' = 4 * G * 2M * m /R^2
F'= 8 GMm/R^2
F'=8F
7:10 marker be like : bulata hai magar jaane kaa nahi😂😂
Kon ye video 11/06/2024 9:36 me dekh raha ha like karo 😂😂😂
1st case if the distance Between object is tripled then the Impact Will be= F becomes 9 times Precious value
ön the Other hand in 2nd case if We doubled Both of the 2masses then F=G*4m upon dsq
ön 3rd case if
the Mass of One of The body is doubled and separation is halved then F=G* 2m upon d by
the result Will be Force Will be 4times Precious value
52:49 to 52:53 😜 This part was the best! Thank you for your teaching sir! I have my finals tomorrow and it helped me a lot!!
February mein kiska final exam hota hai
Hota h ji
@@hariomjee2958 mera😭
Mera hai na
are sir bohot tez chillaye meri fat gyi full volume pe headfone lagake dekh rha tha 😂😂
these lessons help me in difficult times during finals. Bhagawan sai prathana kariti who ki yay channel kabhi band na hoo. :)
(1) Force become 9 time half the previous value.
(2) Force become 4 time the previous value.
(3) Force become 8 time the previous value.
F=G*2m^1*2m^2/r^2 so we will take both the 2 from m1 and m2 as common answer will be half of F
Before 11 I want to revise this chapter
47:18
《1》force become 1/9 times its previous value
《2》force becomes 4 times its previois value
《3》force becomes 8 times its previous value
41:16 1. 9 times decrease
2. Four time increase
3. Eight time increase
2:23:14 The water level will remain same, because as stones will be thrown in the water water would rise, but at the same time, boat will also rise. Therefore, level of water will remain same.
It doesn't relate with boat because the stones will fall in water and for 2:23:14 providing space for stone the water will rise👍🏻
Bhai agar vo khech ke pathar phekega to vo water pressure se niche beth jyega to rise hi hoga