physics and mathematics (1 Viewer)

[abdooooo!!!]

Originally posted by KeypadSDM
It all depends how you percieve motion. When I first saw the physics equations, I was stumped how the derived them, but once we started integration in year 11, I understood why they worked. By the time I got to 4 unit, I found that the use of formulas was only helpful for checking purposes, whereas the mathematics behind it helped me fully appreciate the concept.

hey im fully stumped on how they (physicists) derive them actual formulas and why would they work. how could anyone understand them apart from just being able to use them and manipulating it with algebra or calculus to solve a problem. i know them proofs for something like circular motion's acceleration by the use similar triangles or whatever but still i can't understand how they actually work and work like that. why would them freakin circles do that the idiots!?!?

and can someone tell me how would they know in real life situations the forces applied to something and somehow would be able to formulate it as a function of time or whatever. what the hell... surely its not just by math and observation... no one can be that smart... is it some kind of trial and error with experiments???

i don't find the actual math in those mechanics question challenging... but rather its why would the particles do that and them stupid whole paragraph descriptions of some unnatural motion taking place that i always seem to misinterpret... what the hell is rads and sleeves???

 

[Xayma]

Originally posted by abdooooo!!!
and can someone tell me how would they know in real life situations the forces applied to something and somehow would be able to formulate it as a function of time or whatever. what the hell... surely its not just by math and observation... no one can be that smart... is it some kind of trial and error with experiments???

What I think happens, is they all go and hit the piss that night, and a magical giraffe comes and explains it to them.

 

[mazza_728]

Nah its a purple elephant

 

[abdooooo!!!]

what is with you people... this is serious matter... imagine how freaking hard the engineers and physicists tried to figure out the volumns and surface areas of them animals... they virtually cut and blown up the tens of thousands of elephants and giraffes to obtain a mathematical equation for their f(V) and f(A)... as a function to the length of the giraffes' neck and roundness of the elephants' ears.

 

[BlackJack]

lol. That would depend on the field of physics you're in.

But you'll just have to ask Newton et. al. for this projectile motion. He invented the entire calculus thing and derived the equations.

 

[Xayma]

A fair bit of the time is noticing a pattern then refining the basic forumla through trial and error. I figured out the (a+b)² thing in like yr 5 and used it to do squares in my head (I had a sad life back then)

 

[abdooooo!!!]

i had a calculator when i was in year 5... so yeah im a genius.

Originally posted by BlackJack
But you'll just have to ask Newton et. al. for this projectile motion. He invented the entire calculus thing and derived the equations.

i heard this newton character also invented gravity... umm... i wonder what happened to people and animals in pre-newtonian days...

 

[Xayma]

Originally posted by abdooooo!!!
i had a calculator when i was in year 5... so yeah im a genius.

But could you do them in your head

 

[KeypadSDM]

Originally posted by abdooooo!!!
i heard this newton character also invented gravity... umm... i wonder what happened to people and animals in pre-newtonian days...

Yeah, but we all know that whole "Theory of gravity" was wrong. So how did we stay stuck to the planet before einstein invented relativity?

 

[J0n]

Before that the world was flat

 

[KeypadSDM]

Originally posted by J0n
Before that the world was flat

And since it was the center of the universe we were somehow stuck to the surface. It's pretty cool.

 

[Giant Lobster]

Oh geez whats wrong with gravity now?