Thank you sir for explaining this concept . I had struggled a lot regarding the misconceptions related to 3rd law of motion . But after watching ur video all my doubts are cleared .
I watched alot of videos on RUclips but it seemed like i wasted my time and i almost gave up to find a perfect video but your video proved me wrong,,my all concepts are clear about Newton' s third law of motion,, thank you sir and please keep creating such content ✨👥
thank you sir, those who just want to crack some exams will never want to learn these concepts beacuse they never want to understand physics. Only those who want to learn concepts like to see these videos
Weighing machine neither measures mass nor weight. When an object is kept over it , it measures the NORMAL FORCE acting upon it. Now things get interesting. It divides the Normal Force with the value of acceleration due to gravity(g) ( it is coded to do so) and finally reports us the MASS as reading. Conclusion: 1. Weighing machine Measures Normal Force (which maynot be equal to the objects actual weight) 2. It finally returns us the value of mass by dividing this Normal Force with (g).
N and mg are not equal. But can be equal in a particular case. But they are not action reaction pairs, because their point of actions are different. Is that correct?
Whenever the engine of fhe rocket starts burnt gases are expelled through the nozzle at very high pressure. 1. The engine of the rocket exerts a force on the gases in the downward direction 2. The gases inturn exerts a force on the rocket in the upward direction, due to which the rocket propells into space. Both these forces are equal in magnitude, opposite in direction, act on different bodies and are of same nature. Both these forces arise at the same instant of time. As explained in the video , you can call anyone as action and the other automatically becomes reaction There is no cause-effect relationship between action and reaction. It is not that action occurs before reaction. Both the forces arise at simultaneously
Sir tomorrow is my science exam.. i will be grateful to you if you'll reply on my doubt... Sir my doubt is ki jaisa ki aapne iss video mei bataya hai ki Normal force and mg are not the action reaction pairs. Then sir kya ye dono forces balanced forces hoti hain ?????........ Please reply sir .... And sir please also explain that how does a horse 🐴 moves a cart ???.... Please tell me this in simple language... I am a weak student but I'm trying to be better.. So, sir please reply?!!!!😢😢
@@samikshaverma4122 A horse pushes the ground in the backward direction. According to Newton's third law of motion, a reaction force is exerted by the Earth on the horse in the forward direction. As a result, the cart moves forward.
Sir but why normal force equal to mg why the normal force want to make it in equilibrium in general situation why it cannot be greater in normal situation not in lift case but in rest
Sir sab samajh aa gaya but why is the answer to normal and weight ka reason gives as 1st law and not second law, since acceleration is 0 thats why total forces are balanced?
Sir means gravitational force isliye non-contact force hai kyunki ismei dono hii masses ka centre of gravity contact mei nahi rehta ?? Sir please reply... As I'm in 9th abd thus I'm Little confused 😅😅
When we say gravitational force is non contact force it simply means that force this force to act between two bodies it is not necessary for them to be in physical contact. You and your friend can be 1m apart and this force is still acting between you both. Yes , now since two bodies are not in contact , certainly their center of gravity is also not in contact. You will read it in particle physics how this force actually organiates between two particles.
Earth is pulling the object with a force mg(m being mass of object) while object is pulling the earth towards it with a force Ma (M being mass of earth). Please clariffy if above statment is correct.
Yes it is correct . Earth is pulling the object with a force mg (m=mass of the object) Object is pulling earth with force Ma(M=Mass of earth) Now , here acceleration of object(g)> acceleration of earth(a). Mass of earth (M) > Mass of object(m) Hence , Ma=mg Conclusion: 1. Both earth and object pull each other with same force 2. But the acceleration of earth and object are different. Earth is massive, hence its acceleration is negligible
Sir if normal force is the contact force then why generally it has same magnitude as mg in rest or in uniform motion assuming earth to be in internal frame
That is only when the net force acting on the body is zero. Since normal force acts vertically upwards and its magnitude can be anywhere between zero to infinity, hence it can balance all other downward forces.
When we talk about gravitational force , we only talk about attractive force. Watch the video carefully. The repulsive force that we are talking about in this video is NORMAL Force which is an electromagnetic force caused by inter electronic repulsion at the molecular level.
Sir If I walk then I apply force on surface in backward direction and surface apply reaction on me too in forward direction...Is this statement is true
If you are asking for class 11/12 Level then i would suggest that 1. Start with SL arora for basics 2. You can use any coaching module next like Allen/Motion because you will get good questions in order 3. For Advanced level you can go with DC pandey series. Do not pile up yourself with too many books. Select one ,solve completely and revise it 3-4 times. Also I havent mentioned Hc verma because most of the questions of HCV will be found in coaching materials
Wahi same cheez aap different way me bata rahe ho Wo jo downward normal force hai wo exist karta hin hai gravitational force ke wajah se karta hai Earth object ko neeche ki aur kheenchta hai aur beech me koi surface aa gaya isiliye downward normal force generate hota hai Aur baki sari jo cheezein hai ki earth ko object kheench raha hai wo sab gravitation chapter me clear ho jata hai Maine comment isliye kiya ki aap wo concept puri tarh se galat hai aisa na bolein Aap ye boliye ki uss me thoda aur deeply samajhne ki zaroorat hai
U r right Normal force is not opposite pair of mg . However there is no any harm to say Normal force is a normal reaction of mg . The point is force always exists in pair. In this particular case block is being pulled by earth with mg so this is the magnitude force with which it presses the horizontal surface in turn surface pushes it back with same magnitude of force which is called Normal reaction.
After the video , if you are saying this , then you have completely missed the point. Statements like "Normal Force is the normal reaction of mg " is the root cause of all misconceptions. We must never say this. Rather "Normal Reaction is the reaction , not because of mg but because of its own action at the molecular level". You have added that , "Earth pulls the block with mg and the block in turn pushes the horizontal surface with mg". This statement is correct if and only if , then block is at rest or there are no forces in horizontal directions. If there is a block of mass 4kg kept in a lift and the lift accelerates upwards by 2m/s2 ( assuming g=10m/s2). Do you this , this block would push the horizontal surface downward with 40N? Ofcourse no. Rather this block of mass 4kg would push the horizontal surface downward with 48N ( which isnt equal to mg). Conclusion: So we shouldn't be saying that a block of mass(m) exerts a force mg on the surface. Rather we should say that a block of mass(m) exerts a Normal Force on the surface , which may or may not be equal to mg depending on the acceleration of the block.
Great Video sir 🔥👍. I was totally confused about this, but now understood it at the MOLECULAR level 😘
Thank you sir for explaining this concept . I had struggled a lot regarding the misconceptions related to 3rd law of motion . But after watching ur video all my doubts are cleared .
You're most welcome. Let me know if there is anything else I can help you with!
Sir, you deserve millions of SUBDCIBERS+VIEWS ❤❤
I watched alot of videos on RUclips but it seemed like i wasted my time and i almost gave up to find a perfect video but your video proved me wrong,,my all concepts are clear about Newton' s third law of motion,, thank you sir and please keep creating such content ✨👥
thank you sir, those who just want to crack some exams will never want to learn these concepts beacuse they never want to understand physics. Only those who want to learn concepts like to see these videos
Great sir 😊
Well done
Super sir ji keep it up 👌👌👌👌👌👌👌👌👌👌👌👍👌👍👌👍👌👌👍 katai aisi video aur banao
Thank u sir
Weighing machine measure mass not weight.thats why its measure normal reaction.
Weighing machine neither measures mass nor weight. When an object is kept over it , it measures the NORMAL FORCE acting upon it. Now things get interesting. It divides the Normal Force with the value of acceleration due to gravity(g) ( it is coded to do so) and finally reports us the MASS as reading.
Conclusion: 1. Weighing machine Measures Normal Force (which maynot be equal to the objects actual weight)
2. It finally returns us the value of mass by dividing this Normal Force with (g).
Normal force ÷ g = mass and normal force = weight
Sir why we need large force to bring a higher mass body into motion or rest
Thanks a lotttt sir
Sir if mg = weight means gravitational force then what is the purpose of gravitational law for calculating gravitational force
So there is a huge request :
So please make a video on the difference between weight and gravitational force please 😊
N and mg are not equal. But can be equal in a particular case. But they are not action reaction pairs, because their point of actions are different. Is that correct?
👍👍👍Great work.. Thank you
Archimedes principle explain kr den plzzz
How normal force and mg are equal ?
Sir how a horse pull a cart explain please 🙏🏻
Sir, plz answer what if two bodis comming with different force oppositely than how their action and reaction same????
Sir agar table ke upar box hai aur box ko earth force de raha hey then iska reaction force kya hoga plz batayie sir
Sir at time of launching rocket 🚀 is action and reaction which is first take place
Whenever the engine of fhe rocket starts burnt gases are expelled through the nozzle at very high pressure.
1. The engine of the rocket exerts a force on the gases in the downward direction
2. The gases inturn exerts a force on the rocket in the upward direction, due to which the rocket propells into space.
Both these forces are equal in magnitude, opposite in direction, act on different bodies and are of same nature.
Both these forces arise at the same instant of time.
As explained in the video , you can call anyone as action and the other automatically becomes reaction
There is no cause-effect relationship between action and reaction. It is not that action occurs before reaction. Both the forces arise at simultaneously
@@SouhardyaSutradhar Thanks sir it's my big confussion tha you clear. Thankyou sir
Sir how 3rd law of motion work on gun
Sir tomorrow is my science exam.. i will be grateful to you if you'll reply on my doubt...
Sir my doubt is ki jaisa ki aapne iss video mei bataya hai ki Normal force and mg are not the action reaction pairs. Then sir kya ye dono forces balanced forces hoti hain ?????........
Please reply sir ....
And sir please also explain that how does a horse 🐴 moves a cart ???....
Please tell me this in simple language...
I am a weak student but I'm trying to be better..
So, sir please reply?!!!!😢😢
Normal and mg act on the same body and produces no net acceleration, hence they are for sure balanced forces.
@@SouhardyaSutradhar thank you sir
@@SouhardyaSutradhar Sir but please explain my second doubt too ...
It is about how does a horse moves a cart?
@@samikshaverma4122 A horse pushes the ground in the backward direction. According to Newton's third law of motion, a reaction force is exerted by the Earth on the horse in the forward direction. As a result, the cart moves forward.
Thank you
Please make a video on book laying on the table not not according to newton's third law of motion
Not move
Sir when we fall on a surface we get injured but why ball get bounce in upward direction explain
Inertia
Its suitable for class 9th
I am not understanding it
And which book is good for class 9 physics
Sir but why normal force equal to mg why the normal force want to make it in equilibrium in general situation why it cannot be greater in normal situation not in lift case but in rest
Sir sab samajh aa gaya but why is the answer to normal and weight ka reason gives as 1st law and not second law, since acceleration is 0 thats why total forces are balanced?
Sir means gravitational force isliye non-contact force hai kyunki ismei dono hii masses ka centre of gravity contact mei nahi rehta ??
Sir please reply...
As I'm in 9th abd thus I'm Little confused 😅😅
When we say gravitational force is non contact force it simply means that force this force to act between two bodies it is not necessary for them to be in physical contact. You and your friend can be 1m apart and this force is still acting between you both. Yes , now since two bodies are not in contact , certainly their center of gravity is also not in contact.
You will read it in particle physics how this force actually organiates between two particles.
@@SouhardyaSutradharthank you sir ..😊
thank you so much
Khatra explanation dai, you must deserve a incredible future in upcoming days❤
Thanks for your good wishes. Wishing the same for you
@@SouhardyaSutradhar Thanku dai, sir
17:25
Sir conservation of momentum p agr tym ho to bnana kbhi video .. Boht misconcepts hai,,,
Sure. I will make soon
A.A
Sir g action reaction forces ek dusry ko balance ni kr skti pr ye sab forces to balanced hein
Normal Force and Weight are balanced but they are not action reaction pair
Earth is pulling the object with a force mg(m being mass of object) while object is pulling the earth towards it with a force Ma (M being mass of earth).
Please clariffy if above statment is correct.
Yes it is correct .
Earth is pulling the object with a force mg (m=mass of the object)
Object is pulling earth with force Ma(M=Mass of earth)
Now , here acceleration of object(g)> acceleration of earth(a).
Mass of earth (M) > Mass of object(m)
Hence , Ma=mg
Conclusion:
1. Both earth and object pull each other with same force
2. But the acceleration of earth and object are different. Earth is massive, hence its acceleration is negligible
Sir if normal force is the contact force then why generally it has same magnitude as mg in rest or in uniform motion assuming earth to be in internal frame
That is only when the net force acting on the body is zero. Since normal force acts vertically upwards and its magnitude can be anywhere between zero to infinity, hence it can balance all other downward forces.
Best explanation
This is very good video.
Sir, according to Newton's gravitational law all particles attract each other but why we consider repulsion force?
When we talk about gravitational force , we only talk about attractive force. Watch the video carefully. The repulsive force that we are talking about in this video is NORMAL Force which is an electromagnetic force caused by inter electronic repulsion at the molecular level.
Thank u 🙇♂️🙇♂️🙇♂️
Welcome 🤗
Sir If I walk then I apply force on surface in backward direction and surface apply reaction on me too in forward direction...Is this statement is true
Yeah bro
Things are not so simple in case of walking. I will make a detailed video on this
👍
✌🏻👊🏻👍🏻👍🏻👍🏻👊🏻✌🏻
Thanks for watching
Sir which book is best for Mechanics at undergraduate level
If you are asking for class 11/12 Level then i would suggest that
1. Start with SL arora for basics
2. You can use any coaching module next like Allen/Motion because you will get good questions in order
3. For Advanced level you can go with DC pandey series.
Do not pile up yourself with too many books. Select one ,solve completely and revise it 3-4 times.
Also I havent mentioned Hc verma because most of the questions of HCV will be found in coaching materials
Oky ❤️❤️❤️
Coolest misconception in history of science....😎🤣
Indeed😂
Wahi same cheez aap different way me bata rahe ho
Wo jo downward normal force hai wo exist karta hin hai gravitational force ke wajah se karta hai
Earth object ko neeche ki aur kheenchta hai aur beech me koi surface aa gaya isiliye downward normal force generate hota hai
Aur baki sari jo cheezein hai ki earth ko object kheench raha hai wo sab gravitation chapter me clear ho jata hai
Maine comment isliye kiya ki aap wo concept puri tarh se galat hai aisa na bolein
Aap ye boliye ki uss me thoda aur deeply samajhne ki zaroorat hai
U r right Normal force is not opposite pair of mg . However there is no any harm to say Normal force is a normal reaction of mg . The point is force always exists in pair. In this particular case block is being pulled by earth with mg so this is the magnitude force with which it presses the horizontal surface in turn surface pushes it back with same magnitude of force which is called Normal reaction.
After the video , if you are saying this , then you have completely missed the point.
Statements like "Normal Force is the normal reaction of mg " is the root cause of all misconceptions. We must never say this.
Rather "Normal Reaction is the reaction , not because of mg but because of its own action at the molecular level".
You have added that , "Earth pulls the block with mg and the block in turn pushes the horizontal surface with mg". This statement is correct if and only if , then block is at rest or there are no forces in horizontal directions.
If there is a block of mass 4kg kept in a lift and the lift accelerates upwards by 2m/s2 ( assuming g=10m/s2). Do you this , this block would push the horizontal surface downward with 40N?
Ofcourse no. Rather this block of mass 4kg would push the horizontal surface downward with 48N ( which isnt equal to mg).
Conclusion:
So we shouldn't be saying that a block of mass(m) exerts a force mg on the surface.
Rather we should say that a block of mass(m) exerts a Normal Force on the surface , which may or may not be equal to mg depending on the acceleration of the block.
16:18