The Physics of Euler’s Formula | Laplace Transform Prelude



The simple harmonic oscillator and the fundamental role of complex exponents for ODEs.
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Timestamps:
0:00 – Intro
1:51 – Euler’s formula explained dynamically
9:27 – The harmonic oscillator
21:08 – General linear equations
22:47 – Motivating the Laplace Transform

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These animations are largely made using a custom Python library, manim. See the FAQ comments here:

Music by Vincent Rubinetti.

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39 Comments

  1. Knowing Newton's viscosity law helps you understand the damping effect of fluids. Based on the law the shear stress (which causes opposite force) has a linear relationship with velocity

  2. Sorr, on your video there is one mistake, i think. It's on 15:50, that w= sqrrt(a2/a0) cause of we put it into an equation, we will get -a2*(a2/a0)e^iwt +a0e^iwt. And it doesn't equal to zero. I think, w should be equal to sqrrt(a0/a2). In that case zhen ze do a second derivative, we get -a2*(a0/a2) and that simplifies to -a0e^iwt which +a0e^iwt gives 0

  3. this spring equation reminds me highschool physic courses when we were studying something like RST circuits (or something like that, dont actually remember the exact name).
    It was a sine curve with decreasing peaks and i immediately had the intuition that the peaks decrease was following an negative exponential law, and somehow it felt logical (the less energy you have, the less the curve can decrease, like somehow the energy is the "acceleration" of the discharge) like it does in biology and nuclear decay. Now it makes even more sense because, in a way, it is kind of a spring (if you dont get it, thats fine, i understand myself)

  4. Laplace transforms feel very limited to me because you can’t really take an inverse Laplace transform approximately. It either has an exact solution that someone has solved before, or it’s impossible.

  5. Your videos absolutely nail a very delicate but necessary balance of stepwise presentation of the needed bits with a continual tease of the incredible beauty just around the corner. That—whether in books, music, or shows—is what hooks people.

    So much otherwise good content relies on secondhand recommendations “yeah the first 100 pages are dry but it gets good later”…you have to trust a friend’s advice or already know you like the creator; so many outsiders tire and put down the book not knowing what they missed. Likewise, too much media relies on endless attention-grabbing tease, without giving you anything of substance (the show Lost comes to mind); one’s excitement rapidly turns to disillusionment as they learn not to trust, not to hope for what they thought would arrive.

    Every author or speaker could benefit from taking a page out of your book.

  6. Grant, this is the third time I am watching this and what struck em was the benefit of listening; I couldn't watch the video so I turned up the sound and just listened and it made a huge difference. The comment from the young guy from India below, is priceless. Maybe you should make a series of these lectures that sequentially goes from the beginning to end in math, and make it a special series on the Khan Academy site?

  7. The real genius of this channel isn't the incredible visualizations or the novel takes on ubiquitous mathematical concepts, it's that Grant seems able to perfectly anticipate the precise bafflement I'm about to feel, just as I'm about to feel it. I feel like an object being juggled, just as I'm about to be dropped, a hand appears and keeps me in the game.

  8. Good morning sir guruji
    I learn this topic of Euler's formula for the spring.I must learn more number of lectures from this video Gurujis
    From a senior citizen homes at ,Chengalput

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