Newtonian Mechanics, derivations simplified

[gorpkaiser]

And despite your noble attempt to derive everything from F=ma, your "derivation" of the kinematic equations have nothing whatsoever to do with F=ma.

[troponinnutrition]

Yes they do. The kinematic equations just cancel the mass.

My attempt was in no way "noble" either.

[gorpkaiser]

You complain that "Everything shown in this lecture will be dragged out over a period of 8 weeks or more with much less clarity." Less clarity? LOL. These concepts are very difficult when first approached, and if they were compressed as you seem to suggest, no one would understand anything.

Also no one would understand the limitations, e.g. that these sloppy derivations are only valid for constant acceleration and force.

[troponinnutrition]

So, you're saying that all the cases in which these relations are not valid are explained and derived in a typical Physics I class?

In a typical Physics I course, each equation will be presented such that the majority of the students see no relation between the other equations they've been taught.

Eventually they are taught the Lagrangian and Hamiltonian formalism and never see the relations of classical mechanics and where they meet QM at the classical limit.

[popping01]

hey mr harris.....im studying in the uk im doing alevels mechanics, core maths and physics and im sure you just went through a few SUVAT equations and yeah it does take approxiametly 6 weeks to teach that...nicely done by the way

[Daiquiri420]

Justin Harris... possible superman? Man of science, musician, and Beast-like strength

[andysomethinsomethin]

dude justin i gotta say you are a hell of a smart guy.....i read that you have a degree in kiniesiology did you take it at UK?

[troponinnutrition]

No, but I think the UK presents the "core" sciences much more rigorously than the US. I'm finishing up a degree in Mathematics and Physics and planning to do Theoretical Physics in grad school. I'd love to study in the UK. Many UK programs have theoretical physics programs in their math departments.

You don't see that in the US, but I would love to have that option as my degree will be Applied Mathematics.

(my previous degree was in Kinesiology, which is where my business stems from)

[andysomethinsomethin]

no dude lol not the united kingdom.....the university of kentucky

[troponinnutrition]

lol.....i didn't go there either

[andysomethinsomethin]

yea lol well i heard that the university of kentucky had like one of the top kinesiology programs in the country

[troponinnutrition]

Yeah, I think they're top 25 in Physiology, Anatomy, neurobiology, and a couple of other bio-chem areas. Pretty much all the Biology/Physiology areas. Definitely a good school if you're interested in Kinesiology!

[andysomethinsomethin]

true that..id like to be a trainer someday...right now my friend just turned me on to crossfit which has a pretty intense diet part to it which can be tough to stick too sometimes so ill get like 1 cheat meal a week

[justinklucko]

you're so full of shit

[ibasicallytotalyrule]

i am no longer flaccid

[CuinDisneyLand]

ha man you do everything...bodybuild...your a parent...you powerlift...play piano..and your one smart f'er on top of that. Is there anything you can't do? Can you juggle? perhaps ride a unicycle?

[andysomethinsomethin]

my bet is he can do the ladder of things you listed standing on his head drinking a glass of water

[6ska0z]

not the best explanation i've ever seen, only doing some derivatives, integrals and changing variables. if u wanted to show that you are good at maths, there are some greater stuff to do like making demonstrations of some mathematical theorems.

Physics is more than just making maths, people should really understand the concept behind the formulas, eg. explaining why is the force proporcional to the mass of the object

Cheers, see this as constructive critic for your future videos

[troponinnutrition]

I wanted to show the relations between the formulas, which sadly is rarely shown for some reason. There was no deeper intent to this video.

I've spoken to many students that honestly didn't realize that all these formulas are related.....intimately related.

Understanding the relations helps a student from getting lost when new concepts are presented.....by realizing they aren't any "newer" than F=ma.

I'd do the mathematical theorems....but those are boring as shit. lol

[arshigtx]

Holy fuck dude you are a hero. A passion for mathematics and an insane bodybuilder? Man, I thought I was the only one who shared the same interests...

[bigtonutz]

i agree 100% .i realized that math is really beautiful once you understand that all that math you were thought comes to use in calculus and then you go ohhhhhhhh so that is why i had to learn that crap!! LOL

good stuff justin

[bigtonutz]

i had a great tutor who taught me a home in 2 years from basic math to calculus.drawing the derivatives by hand and stuff and making the x get smaller and smaller and smaller as it approaches zero or going to infinity.very kewl stuff i just reall never had the trade to use it.

it is kewl that you like math :) alot of ppl don't like it.

[troponinnutrition]

I hated it my whole life....because I thought you were supposed to. lol

I had been on a kick of reading physics and cosmology books for the layman. I figured I should learn some math so that I could better understand the material and started self teaching Calculus.

Turns out I just hate numbers.....math is great once you realize it's not numbers and long division. The whole concept of continuity and limits with calculus is something that could be shown to students in a much better light

[bigtonutz]

don't forget the Q.E.D !!!!

I did all of that stuff what a waste LOL. differental equations are kewl :). did i ever use this math NO!!!!!!!!!!!!!

[troponinnutrition]

I did one on Special Relativity, showing the lorentz transformations with hyperbolic geometry.

I don't think I'll be tackling QED any time soon though...lol

I've been reading a book on the mathematics of quantum mechanics written for math majors though....it seems much more fluent than how its taught to physics students....at least to me anyway