Very well explained! It would be cool if you could derive the equations for circular motion too (I'm studying them on this semester and I'm having trouble on making sense of it D:)
Aren’t they the same? You just change position (x) to theta, velocity (v) to omega, and acceleration (a) for alpha. Deriving them should be the exact same.
When you integrate over time, the limits should be t-initial to t-final to be consistent with having x-initial and x-final, etc. In other words t-initial is not always = 0. Your notation is okay as long as you denote t as delta t, but this obscures the fact that sometimes you need a t-initial different than zero.
David Woodside No, that should not be a problem. The origin of a coordinate system x(t) vs t is completely arbitrary, so objectively speaking, there is never a reason to not let t(i) [initial time] be equal to 0. In fact, most professors encourage you to do this.
Dude I'm in eleventh grade n I had to derive all three for a midterm a few months ago and totally blanked out on the starting of the second equation. Then I remembered this. Thank you so much man😊😊
my professor today derived the final equation using algebra, so watching this video i was like "wtf andrew why you lie to me" but you are now forgiven my good sir
I remember watching this video before taking any physics classes- now I’m a year and a lot of math classes through and I’m happy these equations don’t confuse me as much as they initially did 😅 I’m excited and yet extremely nervous for my future classes
It would be very interesting to see a video about equations of linear elasticity. Stress strain relationship, Hooke's Law etc.. Full anisotropic versions would be icing on the cake :)
I was struggling for two days trying to understand this concept. After finding this video, I know now how to derive the equations of motion using calculus.
Dear Andrew, your videos are very informative and useful, but here you forgot to mention that in your calculations the acceleration a is a constant. In general acceleration could be time-dependent. If so you would have to know the time dependence a(t) before performing the integration.
Robert Dewan x-final and x-initial simply stand for arbitrary limits of integration labeled by x to signify that they have units of position. t and 0 correspond to this because there is no reason for the lower bound not to be 0. t is, once again, arbitrary. It is the free parameter, after all. So, there is no choosing the bounds of integration here. They are all arbitrary.
He first integrated v with respect to v so you get v^2 devided by 2 because of the reverse power rule and the he has to put in the limits of integration so you get (vf^2 - vi^2)1/2 this is the same as vf2/2 - vi2/2
For the first equation of motion ,why did you choose your limits for adt as 0 and t but for dv you chose vi and vf? why didnt you choose 0 for vi? conversly, why was 0 chosen for ai?
Great video. Quick question. One of my friend thinks that he'll be able to receive a bachelor's degree in physics without a higher level of math. What course would you say is at the very least necessary?
All physics majors at my university are required to at least go up to Multi-variable Calculus and Differential Equations, and then take a 300 level math elective of their choice (Mine was Linear Algebra). This leaves you only 2 math courses shy of a minor in math which is why a lot of physics majors do that as well ( I took Real Analysis and Partial Differential Equations to get my minor). Hope this helps!
Hugo Lizardi I know this comment is late, but just so you know, it is virtually impossible to study physics without at least taking multivariable calculus and differential equations, both of which have linear algebra as a prerequisite. So, it is virtually impossible to study even mid-level physics without studying high-level maths.
I learnt that in school in the last year (I'm still in high school) but yeah this was a cool revision session, also do 'a day in the life of a physics major' part 2 😊
mmmm, carl sagans cosmos are a good place to learn some general stuff. but if you want to really learn physics, you will need to dig into the mathematics.
God, looking at physicists do math is always weird, it is not wrong, but it is just not generally right. It is fun to look at it though, to think about why it is okay to break the rules in these contexts.
The "triangle thinges" are deltas which means change in. That isn't a calculus concept it is just algebra and is usually introduced with slope, something most people learn in algebra 1.
"This isn't a history class"
Respect my friend
I have respect to history as a study and story based on human curiosity but I have no respect to history as a class subject!!!
It’s interesting to see how one year of physics has aged you so much haha
Oh god hahaha
Andrew Dotson Not necessarily a bad thing, the rugged look works for you haha
And my god, how much 3 years has...
Honest one of the most helpful channels I've found! Keep up the awesome videos!
Chapman ellisor thanks so much!
Very well explained! It would be cool if you could derive the equations for circular motion too (I'm studying them on this semester and I'm having trouble on making sense of it D:)
Igor Guilherme That's a good idea! Circular motion can definitely be tricky
Igor Guilherme YESS DO THIS ONE PLEASE!
Aren’t they the same? You just change position (x) to theta, velocity (v) to omega, and acceleration (a) for alpha. Deriving them should be the exact same.
When you integrate over time, the limits should be t-initial to t-final to be consistent with having x-initial and x-final, etc. In other words t-initial is not always = 0. Your notation is okay as long as you denote t as delta t, but this obscures the fact that sometimes you need a t-initial different than zero.
David Woodside No, that should not be a problem. The origin of a coordinate system x(t) vs t is completely arbitrary, so objectively speaking, there is never a reason to not let t(i) [initial time] be equal to 0. In fact, most professors encourage you to do this.
Nah. As long as x=x initial at t=0, you're fine.
I just want to say thanks for your awesome physics videos, never stop uploading!!!
Dude I'm in eleventh grade n I had to derive all three for a midterm a few months ago and totally blanked out on the starting of the second equation. Then I remembered this. Thank you so much man😊😊
you're definitely my favorite channel. you should derive them from algebra next!
Hunter Weber I was thinking the same thing! I appreciate it!
Well that’s gay
my professor today derived the final equation using algebra, so watching this video i was like "wtf andrew why you lie to me" but you are now forgiven my good sir
I loved your video and clear and helpful explanation. I did not love that I kept reading your "a's" as curly "2's" . my problem, not yours. Thank you!
I remember watching this video before taking any physics classes- now I’m a year and a lot of math classes through and I’m happy these equations don’t confuse me as much as they initially did 😅 I’m excited and yet extremely nervous for my future classes
3:51 SHOTS FIRED
still helping after 7 years. tq so much❤❤
WOW. 🎉🎉 Yeahh this helped a LOT , thank you so much.
Fabulous explanation. I wish my professors have taught me in this way
very useful and understandable!
Pablo pastorea thanks for the positive feedback !
It would be very interesting to see a video about equations of linear elasticity. Stress strain relationship, Hooke's Law etc.. Full anisotropic versions would be icing on the cake :)
It's really cool that you made this video!
Thank you!
I was struggling for two days trying to understand this concept. After finding this video, I know now how to derive the equations of motion using calculus.
0:36 mathematicians: kill me kill me kill me kill me
Thnx a bunch bro!! I've been struggling to derive the third equation!!! Good stuff!!
How can you substitute v as vf?
at 2:43
velocity is a function, but vf is a number
Vf is a limit
This was super helpful!!! I definitely agree that deriving equations is much better than just rote memorization!!
Wait, at 1:12 , how did you integrate int(dv) without a dt term at the back, is it allowed? And what does it mean to integrate without a dt term?
Straight to the point! Quality video, bravo!
Dear Andrew, your videos are very informative and useful, but here you forgot to mention that in your calculations the acceleration a is a constant. In general acceleration could be time-dependent. If so you would have to know the time dependence a(t) before performing the integration.
Sir it seems that you are a physics teacher.sir please give your WhatsApp no if my doubt clear with you.
It's implied that the accelaration is constant. This video is aimed at physics students, not math students.
3:22 where does that 1/2 come from?.....can you please explain
Because integral of at with respect to t is at^2 upon 2 so we can write it as 1/2 at^2
AMAZING WAY OF EXPLAINING.. KEEP IT UP MAN
How did you choose the limits for the integrals and how would they have changed if you had chosen other parameters?
Robert Dewan x-final and x-initial simply stand for arbitrary limits of integration labeled by x to signify that they have units of position. t and 0 correspond to this because there is no reason for the lower bound not to be 0. t is, once again, arbitrary. It is the free parameter, after all. So, there is no choosing the bounds of integration here. They are all arbitrary.
pls do more videos like this!! love these
Hi! At 6:44, Could you explain about the integration so you get 1/2*Vf2-Vi2? Thank you🙏
He first integrated v with respect to v so you get v^2 devided by 2 because of the reverse power rule and the he has to put in the limits of integration so you get (vf^2 - vi^2)1/2 this is the same as vf2/2 - vi2/2
I am a class 11th student and I got understood very well.
Very good explanation! I love these videos with equations!
Thank you so much sir ❤ love from India 🇮🇳
Why would you derive the change in velocity into final velocity
Daniel Avalos Because finding the final velocity is more useful in most contexts.
You've been a big help! Thanks!
For the first equation of motion ,why did you choose your limits for adt as 0 and t but for dv you chose vi and vf? why didnt you choose 0 for vi? conversly, why was 0 chosen for ai?
never mind you answered it later in the vid. You read my mind
Just watching calculus for fun this was great! thanks
"This isn't a history lesson" lmao
What about x=(t*(vi + vf))/2
Use geometry
secretly a trapezoid
Love it sir
I just got it very nicely
And i understood it
Thank you sir
How does this work near a rotating black hole at scales less near a Planck length
Also I think your f = ma is wrong
It’s suppose to be f = am
please derive the equation for the viscosity
Yes the full one with the rank four tensor!
Finally seen an English version
Awesome Video.. Such a great explaination
Thank you so much bro , from India
Great video. Quick question. One of my friend thinks that he'll be able to receive a bachelor's degree in physics without a higher level of math. What course would you say is at the very least necessary?
All physics majors at my university are required to at least go up to Multi-variable Calculus and Differential Equations, and then take a 300 level math elective of their choice (Mine was Linear Algebra). This leaves you only 2 math courses shy of a minor in math which is why a lot of physics majors do that as well ( I took Real Analysis and Partial Differential Equations to get my minor). Hope this helps!
Hugo Lizardi I know this comment is late, but just so you know, it is virtually impossible to study physics without at least taking multivariable calculus and differential equations, both of which have linear algebra as a prerequisite. So, it is virtually impossible to study even mid-level physics without studying high-level maths.
Very well explained !!
so helpful buddy loved it thnxx
Hi. You misused equal sign once along the line.
I loved this one! Excellent!
how do i make you my TA?
Thank you! This was so useful ♥️
excellent video my friend!!!
Try doing a voiceover of videos. The sound is kinda low.
Thanks for letting me know!
but HOW do you actually memorize these equations?
Ms Eshiba-Emir Keep working with them and you’ll eventually write them without needing to derive them
You don't memorize equations. You learn them.
sooooo sooo life saving .. THANK YOU
I learnt that in school in the last year (I'm still in high school) but yeah this was a cool revision session, also do 'a day in the life of a physics major' part 2 😊
Chaitanya Singh that's awesome! I'll definitely make more of those once classes start back up!
Thanks for the help dad
x=vft - (1/2)at^2
depends how you define a
Thank you helped a lot
Hello im currently in secondary school(English high school) and i was hoping if you could guide me through physics, what should i start with?
Halliday Resnick & Walker - Fundamentals of Physics (if you have a good grasp on calculus)
QsHsNation1 how about any tv shows
mmmm, carl sagans cosmos are a good place to learn some general stuff. but if you want to really learn physics, you will need to dig into the mathematics.
Very helpful!
Love from India😇
Bravo 👏🏻
Bernaulli's theorem
Thank you very much!
Well the first derivation is only true for constant acceleration
@Smit Shilpatul true dat, I do not know what the f i was thinking
dope man!
Awesome video, but poor sound quality! :/
Thank you
well done :)
"multiply bothsides by dt" that's not calculus..
Yep calculus makes things a lot easier.
the third one was hardest
God, looking at physicists do math is always weird, it is not wrong, but it is just not generally right. It is fun to look at it though, to think about why it is okay to break the rules in these contexts.
What rules do you see being broken?
2:43 :))))))
*with basic Calculus*
Umm there is a wrong =
And some math passage a bit non mathematician
Better was dv=a*dt--->v*dv=a*dt*dx/ dt----->v*dv=a *dx
thx
Nice
helpful
Okay ....im in 9th grade and iv3 no idea what those triangle thingies are 😐😑😑 can you make a a simple version of this video? Please?
Suni Santhosh I do have a video of this with out calculus
The "triangle thinges" are deltas which means change in. That isn't a calculus concept it is just algebra and is usually introduced with slope, something most people learn in algebra 1.
Woah
wow
nyssss.............
bro, u write 'a' like 2
if that's how you write two's, then you write like a kindergartner.
Why he looks like Robert Pattinson for me...???