8:12 Was a moment of ephiphany for me...Thank U very much for making a dedicated video on this doubt...feels great for being the part of 1st video of this new series!!
I had this doubt from a very long time..i was like , why the hell is this time negative.. finally!! i cleared this doubt of mine.. wonderful explanation sir , thank u :)
@@Mahesh_Shenoy Yes, Mathematics, JEE and soon about to get started with Entrepreneurship. A student of mine suggest your channel and I'm just hooked to your videos, wonderful content sir.
HAHAHAHA Mridul was watching PhysicsWallah's old lecture videos about Kinematics where the same question was asked by him about why Time is neglected as a 'negative value'. It's hilarious!
The expression you had on your face made me smile for 10 minutes straight, it was wonderful. isn't it wonderful to experience Eureka moments in life? Do you think that's motivation enough to pursue higher studies?
I think I realised this fact when we study time taken by a projectile when you throw it with some initial velocity. If we fix h max=20 and try to find time taken by the projectile to come back we get 4 seconds. 2 seconds to go up and 2 to come down. This is just half of that problem.
I am guessing you are referring to one of the cubes behind. Yes, it was a phase!!! Not to brag, but I can solve them without any algorithms - pure intuition!!!
Hi! Brilliant and very thought provoking video. I had a question though. Would going 'backwards' in time, mean going 0, -1, -2? Or -2,-1,0? In this case it seems to be the latter. One more question, just to see if I'm understanding correctly. The equation simply interprets that at t = 0, the ball has zero initial velocity. That could be if at t = 0, we were sort of pushing the ball off (without throwing it or anything), or if we threw up the ball at t = -2 seconds, causing it to reach 0 velocity, 20 m later. But doesn't that also require us to throw the ball up at a particular speed? v = u + at v = 0 a = -10 t = 2s 0 = u + -10x2 u = 20m/s Thank you! It was fun to watch it nonetheless.
The - sign is used for direction i.e going backward in time will incease the time with - sign i.e - indicate the going back in time and magnitude indicates how much back you went in time.....
Let's say that I push a ball to roll upwards the dome, then gravity stops perfectly at the very top of the dome. No other forces in the system. Does it mean that the ball, sitting indefinitely long at the top, can suddenly start rolling down WITHOUT any force starting the motion or throwing it off the balance? As it could roll up the dome and stop, so it should work in the other direction of time too?
Haven't completed this but your teaching method of coloring in the variables and numbers associated with each other is some smart teaching methodology teachers take notes. I would say teacher's teaching methods absolutely suck ass in general but this was well done.
You won my heart man.❤❤ The way of your thinking utterly flatter me. I have never meet a teachor like you. And now i am feeling bliss with such a extraordinary answer and your thinking. Thank a lot for helping us to solve our problems.❤❤❤
Can we say that an unbalanced force always produces an effect, be it moving the object if it's free to move, smashing the object if its not free to move or just increasing the heat energy of the object by a fraction depending on its magnitude?
Hlo sir! This is Yuvraj this side.. I have a doubt and I came across this when I was learning what thermal velocity and drift velocity are. I'll start in 3..2..1.. My first question is when we say that the average thermal velocity of all the electrons is 0. Do we calculate this at an instant? If yes then, is my way of calculating it correct? since the motion of electrons is random inside a conductor. Thus on an average the number of electrons moving in a particular direction is equal to the number of electrons moving in opposite direction at an instant. Thus, the vector sum of the thermal velocities of all the electrons at an instant is 0..(since for every vector there is some other vector nullifying this.) Now the vector sum of the velocities of all the electrons divided by the number of electrons is the average thermal velocity .. Thus average thermal velocity is also 0.. Since 0 divided the number of electrons is 0.. If we calculate it at an instant then is it calculated the same way I have calculated? One more question if we don't consider a particular instant of time. Then the average thermal velocity of a single electron should also be zero.. Since it goes and comes back to the same spot when there is no electric field?
First of all, I love how deeply you are thinking! To summarise, your question is, 'are we averaging the velocities over all electrons at a specific time, or are we averaging the velocities over all time for a specific electron?' And the answer is that both should yield the same answer! Why? Since things are random, adding up velocities of a million electrons should give the same result as adding up velocities of a single electron over a million instants. It's like tossing 1 coin a million times vs. tossing a million coins at once. They both yield the same result because the tossing of each coin is independent of the other. So, whether you do it one after the other or simultaneously, it shouldn't matter. Does that make sense? And you calculated the average velocity for a specific instant perfectly! Finally, you may also ask, but how do we know it will be exactly zero? It need not be! It's just that the more electrons (or instants) you consider, the smaller the number gets! For billions of electrons, the number will be negligible compared to other quantities (like the thermal velocity)! Again, it's kind of like the probability of getting heads. If you toss a billion coins, would we get exactly half of their heads and the other tails? NO. We might get a few million extra heads. But, a few million is negligible compared to the billions we are dealing with! Never stop asking questions!
@@Mahesh_Shenoy Thank you much sir for answering the question I was bewildered with.😇😇..I knew you were the one who could give a satisfactory answer .I would be asking a few more questions probably in upcoming days in case I get a doubt.I hope I get answers of all of them.. ..
But again a moment of confusion comes along, that as for convention we have taken below quantities -ve and upward +ve. Then as you told t = -2 i.e. before the watch time by simulating that as ball is going upwards in -ve time whereas going down is +ve time. But It contradicts the convention as given? So, Am I wrong by asking this silly Question?
I didn’t understand your question! Are you saying we have chosen upward positive but we considered the ball going upwards as negative time? Well the signs are for different quantities! One is for length and the other is for time!
ok , if there was 2 answers , one positive and one negative , in this example they equaled to each other , in other problems , they did not equal to each other , how do you explain that , the time the stone in free fall from now is greater or less than the stone has been in free fall since forever
Roger Penrose disagrees with this "Freefall Forever" concept since he explains how the equivalence principle originates from quantum noncommutative nonlocality as protoconsciousness.
@@Mahesh_Shenoy Oh if you study math Professor Lou Kauffman - he explains that the square root of negative one is not based on a complex number as symmetric commutative geometry. Rather the square root of negative one arises out of quantum algebra as what Kauffman calls "primordial time" and Roger Penrose calls it "fundamental time." Quantum physics Professor Basil J. Hiley who has worked with Penrose, Hiley also has great papers on the noncommutative truth of quantum physics. So it means that in what Hiley calls "preSpace" there is this nonlocal process that is noncommutative. Hiley points out that this process is also at the macrolevel as demonstrated with the Dirac Belt Trick or the Dirac Dance (that I learned my first year of college from Herbert J. Bernstein of neutron spin fame and quantum teleportation satellite system fame). In fact the "three gunas" of ancient India are also based on the truth of music as noncommutative philosophy as Fields Medal math professor Alain Connes explains this truth of music in his lecture, "Music of Shapes" - he gives several versions that are posted on youtube. Check out Connes' lecture on the origin of quantum randomness - he goes into how it's from noncommutativity and then he uses music theory as the simplest explanation of noncommutativity. So the Satta is the octave and Rajas is the Perfect Fifth while Tamas is the Perfect Fourth - this was understood in PreSocratic Pythagorean philosophy also. Philolaus lied about music theory thereby creating irrational magnitude commutative geometry math that is the heart of Platonic philosophy and western science. Connes explains how since all of modern science is based on commutative geometry therefore scientists consider noncommutative quantum algebra to be a "nuisance" and "strange." hahaha.
In engineering problems we firstly define Datum line (which means that it is zero meter distance, all the other distances are relative distances with respect to datum)
Sir it is said that a cell converts chemical energy into electrical energy. But I didn't get it that how this happens. Please describe the whole cell process.
@@palak6981 its magnitude is constant but its direction continously changes. The case with acceleration in uniform circular motion is just as the case with velocity of particle in uniform circular motion.
Does this work if the body was with initial value say 2m/s because if you solve , you end up with two answers , and are not the same in magnitude one is positive and the other is negative
No man!! How do you expect them to give such cool questions to ponder upon....they will say complete the last exercise of the chapter by your own and show me before 12 pm:(
When I receive a notification from your channel, I think to myself, "It's time to explore something interesting." Your videos truly astonish me.I also need to know something. Can I get your email ?
![Why less energy means more stability? [Pure Logic]](http://i.ytimg.com/vi/76n7BmqAeOs/mqdefault.jpg)
8:12
Was a moment of ephiphany for me...Thank U very much for making a dedicated video on this doubt...feels great for being the part of 1st video of this new series!!
Thanks for asking the question, Mridul!
@@Mahesh_Shenoy insead of calling it a negeive time call it chucky
Brooo ! You actually made me fall in love with physics , you're awesome
So awesome to hear that, Rudraksh!
I had this doubt from a very long time..i was like , why the hell is this time negative.. finally!! i cleared this doubt of mine.. wonderful explanation sir , thank u :)
Great to hear that, Deepthi!!
This is real physics 🔥🔥
Our schools are not explained this thing 😢...
Trying to understand math and how it applies to physics led to the discovery of antimatter. It was in the equations first.
When he said "the equation doesn't know there's a ground" I immediately went "aww 🥹 that's adorable"
Good work 👌, It was fun watching it.
Thanks a lot, will be making more! Do you make JEE videos?
@@Mahesh_Shenoy ya
@@Mahesh_Shenoy Yes, Mathematics, JEE and soon about to get started with Entrepreneurship.
A student of mine suggest your channel and I'm just hooked to your videos, wonderful content sir.
@@jeesimplified Just checked, great stuff!!
@@jeesimplified that student was me,lol
Why can't every physics teacher be like you 😭?
Amazing explanation sir.
Bet teacher ever seen .... Thanku sir for amazing explanation 🙏 ... Entertaining explanation
Very very interesting vedio , I can't never put in my words 🙂 Thank you sir
Thanks :)
What an amazing explanation. With this deep level of thinking, one can crack jee adv as well
Absolutely! JEE shouldn't be the aim. Aim much higher!
Those that do not believe in negative time, (including many of my professors) do not understand or appreciate a NASA launch.
Amazing video, during the jee prep everyone are solving questions, but no one absorb this deep thinking and approach towards simple things, loved it
Amazing video, during the jee prep everyone are solving questions, but no one observe this deep thinking and approach towards simple things, loved it
HAHAHAHA Mridul was watching PhysicsWallah's old lecture videos about Kinematics where the same question was asked by him about why Time is neglected as a 'negative value'. It's hilarious!
Same bro and the question asked is also same
GOAT TEACHER 👑👑
A simple point explained so beautifully 🎉
The expression you had on your face made me smile for 10 minutes straight, it was wonderful. isn't it wonderful to experience Eureka moments in life? Do you think that's motivation enough to pursue higher studies?
I think I realised this fact when we study time taken by a projectile when you throw it with some initial velocity. If we fix h max=20 and try to find time taken by the projectile to come back we get 4 seconds. 2 seconds to go up and 2 to come down. This is just half of that problem.
Mindblowing.Love you from Bangladesh.
Thanks Rafiqul :)
What is the application you use to write?
Thanks in advance.
I have discovered this channel today.and l have fallen in love with you guy.
Awwww! Welcome to the tribe :)
excellent explanation! did not have such clarity before watching your explanation!
Wow, feels awesome coming from you!!
Ok someone's been solving megamorphix. A man of culture.
I am guessing you are referring to one of the cubes behind. Yes, it was a phase!!!
Not to brag, but I can solve them without any algorithms - pure intuition!!!
Please upload these basic videos more and more❤
Hi! Brilliant and very thought provoking video. I had a question though. Would going 'backwards' in time, mean going 0, -1, -2? Or -2,-1,0? In this case it seems to be the latter.
One more question, just to see if I'm understanding correctly. The equation simply interprets that at t = 0, the ball has zero initial velocity. That could be if at t = 0, we were sort of pushing the ball off (without throwing it or anything), or if we threw up the ball at t = -2 seconds, causing it to reach 0 velocity, 20 m later. But doesn't that also require us to throw the ball up at a particular speed?
v = u + at
v = 0
a = -10
t = 2s
0 = u + -10x2
u = 20m/s
Thank you! It was fun to watch it nonetheless.
The - sign is used for direction i.e going backward in time will incease the time with - sign i.e
- indicate the going back in time and magnitude indicates how much back you went in time.....
Thank you so much sir
You ar welcome
Excellent
Let's say that I push a ball to roll upwards the dome, then gravity stops perfectly at the very top of the dome. No other forces in the system.
Does it mean that the ball, sitting indefinitely long at the top, can suddenly start rolling down WITHOUT any force starting the motion or throwing it off the balance? As it could roll up the dome and stop, so it should work in the other direction of time too?
Hey mahesh shenoy!!
I adore watching ur videos!
Really interesting!!
Can u make videos regarding magnetism,photons and quarks??
Hey, good to hear that, thanks Pratham! Yes!
Very nice explanation
This video helps me a lot, Thank you so much ❤.. Please make a video on Einstein relativity,, why does all that depends on velocity ?
Haven't completed this but your teaching method of coloring in the variables and numbers associated with each other is some smart teaching methodology teachers take notes. I would say teacher's teaching methods absolutely suck ass in general but this was well done.
that was so mind blowing
You won my heart man.❤❤ The way of your thinking utterly flatter me. I have never meet a teachor like you. And now i am feeling bliss with such a extraordinary answer and your thinking. Thank a lot for helping us to solve our problems.❤❤❤
Very cool!
Thanks!!
Cool.
Please make a video elaborating the difference between momentum and kinetic energy.
Added to the list!
Running short of words to thank you. /\
Why not accelerate more than speed of light kindly explain
Can we say that an unbalanced force always produces an effect, be it moving the object if it's free to move, smashing the object if its not free to move or just increasing the heat energy of the object by a fraction depending on its magnitude?
How can an unbalanced force act on a body NOT free to move? If it's not free to move, the forces must be balanced, no?
My bad :(
Please excuse my ignorance. My reframed question would be, 'does an applied force always produce an effect?'
Mindblowing!!
Equation doesn't know that...
He is super amazing
Yea, learning deeply always blows my mind too!
Hlo sir!
This is Yuvraj this side..
I have a doubt and I came across this when I was learning what thermal velocity and drift velocity are.
I'll start in 3..2..1..
My first question is when we say that the average thermal velocity of all the electrons is 0. Do we calculate this at an instant?
If yes then, is my way of calculating it correct?
since the motion of electrons is random inside a conductor. Thus on an average the number of electrons moving in a particular direction is equal to the number of electrons moving in opposite direction at an instant. Thus, the vector sum of the thermal velocities of all the electrons at an instant is 0..(since for every vector there is some other vector nullifying this.) Now the vector sum of the velocities of all the electrons divided by the number of electrons is the average thermal velocity .. Thus average thermal velocity is also 0.. Since 0 divided the number of electrons is 0..
If we calculate it at an instant then is it calculated the same way I have calculated?
One more question if we don't consider a particular instant of time. Then the average thermal velocity of a single electron should also be zero.. Since it goes and comes back to the same spot when there is no electric field?
First of all, I love how deeply you are thinking!
To summarise, your question is, 'are we averaging the velocities over all electrons at a specific time, or are we averaging the velocities over all time for a specific electron?'
And the answer is that both should yield the same answer! Why?
Since things are random, adding up velocities of a million electrons should give the same result as adding up velocities of a single electron over a million instants. It's like tossing 1 coin a million times vs. tossing a million coins at once. They both yield the same result because the tossing of each coin is independent of the other. So, whether you do it one after the other or simultaneously, it shouldn't matter.
Does that make sense?
And you calculated the average velocity for a specific instant perfectly!
Finally, you may also ask, but how do we know it will be exactly zero? It need not be! It's just that the more electrons (or instants) you consider, the smaller the number gets! For billions of electrons, the number will be negligible compared to other quantities (like the thermal velocity)!
Again, it's kind of like the probability of getting heads. If you toss a billion coins, would we get exactly half of their heads and the other tails? NO. We might get a few million extra heads. But, a few million is negligible compared to the billions we are dealing with!
Never stop asking questions!
@@Mahesh_Shenoy Thank you much sir for answering the question I was bewildered with.😇😇..I knew you were the one who could give a satisfactory answer .I would be asking a few more questions probably in upcoming days in case I get a doubt.I hope I get answers of all of them.. ..
So that we need the concept of rms
This kinda stuff is seldom taught in schools or coaching centers.
Yes, yes I know right!
But again a moment of confusion comes along, that as for convention we have taken below quantities -ve and upward +ve.
Then as you told t = -2 i.e. before the watch time by simulating that as ball is going upwards in -ve time whereas going down is +ve time.
But It contradicts the convention as given? So, Am I wrong by asking this silly Question?
I didn’t understand your question!
Are you saying we have chosen upward positive but we considered the ball going upwards as negative time?
Well the signs are for different quantities! One is for length and the other is for time!
@@Mahesh_Shenoy thanks that's was the whole question. I just wanted to go more deeper
SO GOOD
Sirji , Mai aapka fan ho gya.....🫡
I found someone who thinks like me and try to find answer of some very commonly neglected questions with logic😊
You are really amazing.😍
Thanks bud! It's science that's amazing :)
My video had a playback error, how ironic
ok , if there was 2 answers , one positive and one negative , in this example they equaled to each other , in other problems , they did not equal to each other , how do you explain that , the time the stone in free fall from now is greater or less than the stone has been in free fall since forever
OMG, I'm starting to understand 😮🎉🎉🎉 ;;___;
Roger Penrose disagrees with this "Freefall Forever" concept since he explains how the equivalence principle originates from quantum noncommutative nonlocality as protoconsciousness.
I couldn't follow!
@@Mahesh_Shenoy Oh if you study math Professor Lou Kauffman - he explains that the square root of negative one is not based on a complex number as symmetric commutative geometry. Rather the square root of negative one arises out of quantum algebra as what Kauffman calls "primordial time" and Roger Penrose calls it "fundamental time." Quantum physics Professor Basil J. Hiley who has worked with Penrose, Hiley also has great papers on the noncommutative truth of quantum physics. So it means that in what Hiley calls "preSpace" there is this nonlocal process that is noncommutative. Hiley points out that this process is also at the macrolevel as demonstrated with the Dirac Belt Trick or the Dirac Dance (that I learned my first year of college from Herbert J. Bernstein of neutron spin fame and quantum teleportation satellite system fame).
In fact the "three gunas" of ancient India are also based on the truth of music as noncommutative philosophy as Fields Medal math professor Alain Connes explains this truth of music in his lecture, "Music of Shapes" - he gives several versions that are posted on youtube. Check out Connes' lecture on the origin of quantum randomness - he goes into how it's from noncommutativity and then he uses music theory as the simplest explanation of noncommutativity.
So the Satta is the octave and Rajas is the Perfect Fifth while Tamas is the Perfect Fourth - this was understood in PreSocratic Pythagorean philosophy also. Philolaus lied about music theory thereby creating irrational magnitude commutative geometry math that is the heart of Platonic philosophy and western science. Connes explains how since all of modern science is based on commutative geometry therefore scientists consider noncommutative quantum algebra to be a "nuisance" and "strange." hahaha.
There is a concept of Datum line, we define from where S=0m .
I didn’t get you!
In engineering problems we firstly define Datum line (which means that it is zero meter distance, all the other distances are relative distances with respect to datum)
Sir it is said that a cell converts chemical energy into electrical energy. But I didn't get it that how this happens. Please describe the whole cell process.
Added to the list!
@@Mahesh_Shenoy THANK YOU
@@Mahesh_Shenoy sir when will you upload video on cell
Suppose a body is retarding and the final velocity is zero(comes to rest),will a negative value of time come?
Great question! What do you think?
@@Mahesh_Shenoy well I don't know I am a bit confused....
Your back , library. Is sapiens book.
Omg . I am feeling like we are developing a game and discussing lol 😂
Haha! By the way you use the same equations for games too!
@@Mahesh_Shenoy 😄
Can a body move with uniform acceleration in a circular path?
What do you think?
Since I am doubtful, l googled and found both the answers, ' yes' as well as 'no'.
But sir my inclination is towards no
@@palak6981 its magnitude is constant but its direction continously changes. The case with acceleration in uniform circular motion is just as the case with velocity of particle in uniform circular motion.
oh nice ......
:)
Mja aagya Explanation me
Mja aagya banane me!
The equation does not know there is a medium, and it does not know there is temporality! ... I think
I good lesson on how you can't use mathematical theory to prove historical events 🙂
Does this work if the body was with initial value say 2m/s because if you solve , you end up with two answers , and are not the same in magnitude one is positive and the other is negative
The same applies!
how would the time come negative? could someone explain me in the form of an equation
im getting t as +ve only
Square root can have both positive and negative answers
-0:01
I think if we do this then we cannot calculatrle delta t so it's wrong
I didn't get you, can you elaborate?
YESSSSIRRRRRR
Noice noice noice 👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻🆒🆒🆒🆒🆒🆒
Are you just doing his homework? 🤔
I doubt it.
Homework questions, like most questions in Indian curricula, don't make you think!
No man!! How do you expect them to give such cool questions to ponder upon....they will say complete the last exercise of the chapter by your own and show me before 12 pm:(
@@thesagescrown
Wdym?
time but reversed
Came here from JEE Simplified channel
Wonderful channel!
baiter
When I receive a notification from your channel, I think to myself, "It's time to explore something interesting."
Your videos truly astonish me.I also need to know something.
Can I get your email ?
vag.mahesh@gmail.com
Where is my slippers 🤬
Amazing video, during the jee prep everyone are solving questions, but no one absorb this deep thinking and approach towards simple things, loved it