Cringe Thread

[Anonymous No.7010157]

ti

[Anonymous No.7010162]

[Anonymous No.7010194]

Ayyyy

[Anonymous No.7010277]

[Anonymous No.7010279]

[Anonymous No.7010280]

>>7010277
>3 people like this

[Anonymous No.7010317]

>>7010279
>common core math

[Anonymous No.7010345]

>>7010279
Common core math is so stupid. You only need to know how to do the arithmetic, and if you aren't a fucking autist, it is easily comprehended at the age of 6.

[Anonymous No.7010350]

>>7010277
every fucking time

[Anonymous No.7010391]

>>7010277
>sorry I'm really smart
>when I think freely I tend to shatter reality

[Anonymous No.7010392]

>>7010317
http://youtu.be/LQ8Nr3_2724

Common core: a sack of buckshot on the white kid's shoulders to bring him down to nonwhite levels, so everyone is equal.

[Anonymous No.7010415]

>>7010277
>if you go in the future and put a rock somewhere and then go back in time, the rock will be where you put it because it's there in the future.

wut.
Does he even realize how wrong he is?

[Anonymous No.7010434]

>>7010157
what is the real reason for 1/2 though

[Anonymous No.7010439]

>>7010434

I'm a mathematician, so I think the answer is bc work is an integral. Hopefully someone with physical intuition can explain otherwise.

[Anonymous No.7010443]

>>7010434
integrate momentum with respect to speed

[Anonymous No.7010444]

>>7010434
>>7010439
It is 1/2 because it's the first integral of Newton's equation.

[Anonymous No.7010456]

>>7010279
I don't get it. The problem asked 427-316. The answer is 111. Why is the parent stupid?

[Anonymous No.7010463]

>>7010279
Counting backwards is still more complicated than visually subtracting memorized abstractions the old way.

[Anonymous No.7010473]

>>7010456
Jack did not get 111. The parent is complaining that Jack used the wonky-ass number line thing instead of subtracting like a normal person

[Anonymous No.7010485]

>>7010473
But that is how a normal person would do it in their head.

[Anonymous No.7010488]

>>7010485
What? I visualize it as I would be writing it on paper...

Do you really count backwards like a little kid?

[Anonymous No.7010497]

>>7010157
That's just so incredibly retarded it might be brilliant.

[Anonymous No.7010501]

>>7010488
When you do that, you are doing the same thing.
First you subtract a certain number of ones. The you subtract a certain number of 10s. Then a certain number of 100s.
Stop being a fucking idiot. What, do you think subtracting all the 1 digit numbers just works because "majyck?"
No. That's how it's done, and common core teaches them the foundations of why it's done that way. I don't understand how people can be so fucking retarded that they have any issue with anything they talk about. It all makes sense and is better.

[Anonymous No.7010515]

>>7010501
You are the worst kind of person.

[Anonymous No.7010522]

>>7010501
We all learned the foundations that way, but just for ones. Memorizing all possible x-y scenarios when x and y are <10 then using combinations of that is faster than applying the number line to every possible problem.

[Anonymous No.7011274]

>>7010515
No, you are. Because my argument is valid and yours is invalid.
>>7010522
Yeah, they can learn to do that after learning why i works. I never learned why that worked, until I figured it out on my own. It's like the fundamental thm of calc. Had no clue why it worked til I gave it a good think. Just, as a kid, giving it a good think is difficult.

[Anonymous No.7011299]

>>7010157
well it isn't the first time vis viva has had some cringeworthy comments on it

[Anonymous No.7011304]

>>7010157
I cringe whenever I see this video.
https://www.youtube.com/watch?v=3cI7sFr707s

[Anonymous No.7011314]

>>7010515
>>7010522

Lol it's just there to give kids intuition behind why the math works and show them there's more than one way to solve a problem, which is a better way to produce good mathematicians instead of future /sci/ browsers

[Anonymous No.7011380]

>>7010501
>. I don't understand how people can be so fucking retarded that they have any issue with anything they talk about.
I think they pretend they are retarded so they can get angry at the common core.

[Anonymous No.7011389]

>>7011274
>Because my argument is valid and yours is invalid.

No it's not.

[Anonymous No.7011625]

I'm in diff eq but I am absolute shit at arithmetic.

[Anonymous No.7012065]

>>7011625
youre not the only one
i can solve pretty much anything with a solution
but when it comes to numbers i need a fucking calculator
this only is recent though i used to be good at mental arithmetic
why is this happen to me ;_;

[Anonymous No.7013218]

>>7010157
>First Physics class of the semester
>sit down and look around room
>an actual 300 pound fedora wearing neckbeard in the class
>didn't realize they actually existed IRL, thought it was just a meme
>disgusted at humanity

[Anonymous No.7013253]

>>7010434
W = F l
W = m a l
W = m dv/dt v dt
W = m v dv
W= 1/2 m v^2

[Anonymous No.7013256]

>>7010279
I don't get this shit... I mean I'm usually good at word problems but... Help...

[Anonymous No.7013265]

>>7010434
In the end it's arbitrary. You could define it without the 1/2, but then you'd have a factor 2 in some other quantities which would be inconvenient. Historically we went from <span class="math">E = \int ds F[/spoiler], which suggests the convention as it's used. But sure, you could scale every physical law by a factor without changing the physics.

[Anonymous No.7013269]

>>7011389
fuck off, stop pretending to be retarded on a fucking slow board, go bait somewhere else

[Anonymous No.7013288]

[Anonymous No.7013291]

[Anonymous No.7013295]

>basically, science is just as hokey as anything else and we shouldn't glorify it as reflecting objective, unbiased truth. neato

[Anonymous No.7013302]

>>7013256
Some education major taking in government kickbacks and trying to make a name for his or herself thought that this would be a good idea to help people struggling with math understand it better by splitting it up into lots of little problems. But it ended up confusing stupid kids and infuriating smart ones and causing more mistakes to be made because the more steps you have the more chances of mistake.

[Anonymous No.7013316]

>>7013253
dv/dt is not a fraction, nor are dv, dt quantities that can be manipulated. That is literally nonsensical.

[Anonymous No.7013340]

>>7013302
>But it ended up confusing stupid kids and infuriating smart ones and causing more mistakes to be made because the more steps you have the more chances of mistake.

[Anonymous No.7013349]

>>7013316
(dv/dt)dt is literally the same as dv in any context by the chain rule. it's notation sugar.

[Anonymous No.7013361]

>>7013253
Can someone write this more clearly in latex because I'm not sure what's going on here.

[Anonymous No.7013385]

>>7013340
I get that it's satirical, but that image has basically got it backward.

The Common Core alternative arithmetic is about using a lot of little steps of creative reasoning that are suitable for solving simple problems in your head, but can lead to meandering about and losing track of what you're doing, making mistakes, and taking a lot of extra scrap paper and effort where larger numbers are involved, rather than following a simple, rigid algorithm that consistently solves problems no matter how big the numbers are.

Going from solving a quadratic equation by creative algebraic manipulation, to just memorizing and applying the quadratic formula, is the opposite of the kind of change Common Core represents.

[Anonymous No.7013389]

>>7010392

Oh my God...

[Anonymous No.7013401]

>>7013316
Let v(t) be a differentiable function of t.

v(t+h)-v(t)=A*h+o(h) as h->0 at the point t.
The differnetial dv(h) is a function of h defined by A*h.
We define A to be v' (using the usual limit definition which obviously works here)
Take the special case of the identity function, and you have
dv/dt=v'
Now,
dt=h obviously
dv/dt*dt=v'h=dv

Problem solved. Just define differentials and everything will be good.

[Anonymous No.7013415]

>>7013389

[Anonymous No.7013469]

>>7013401
>>7013349

you fucking retards, you don't need any dv's and dt's .

W= F *S
F=m*a
V^2= V0^2 +2*a*S from that you get that:

a=(V^2-V0^2)/2s
go back to Force= m*a
then go back to Work= F*S
===>

W= m*(V^2-Vo^2)/2S *s
W=((V^2*m)/2) - (Vo^2*m0/2)
W=E= V^2 * m/2

jesus fuck! sci!

[Anonymous No.7013476]

>>7013361

Integrate momentum with respect to time. int(mv) = (mv^2) / 2

[Anonymous No.7013508]

>>7013415

it's sad the lengths someone who probably failed math will go to in order to stop kids from learning new ways to visualize math

[Anonymous No.7013520]

>>7013415
What am I looking at here?

[Anonymous No.7013573]

[Anonymuos No.7013615]

>>7013573
Huh?

[Anonymous No.7013691]

>>7013469
Who said I needed anything? I was just replying to that anon. I don't even know what the original problem is about. Sheesh.

[Anonymous No.7013803]

>>7013691
what you said is stupid. this is /sci/

[Anonymous No.7013810]

>>7013573
haha wtf

[Anonymous No.7013895]

>>7013415
Except the old way is fucking 16 you dumb cunts.

[Anonymous No.7013907]

>>7013361
<span class="math">Work = \Delta E = \int_0^{x_f} F dx[/spoiler]

Let E start at zero at x = 0, v = 0.

<span class="math"> F = m a = m \frac{dv}{dt} = m \frac{dv}{dx}\frac{dx}{dt} = m v \frac{dv}{dx}[/spoiler]

<span class="math"> E = \int_0^{x_f} F dx = \int_0^{x_f} m v \frac{dv}{dx} dx = \int_0^{v_f} m v dv = \frac{1}{2} m v_f^2[/spoiler]

[Anonymous No.7013959]

>>7010277
>I'v ebeen thing about quantum mechanics cause I can
Here we have a /sci/ newfag

[Anonymuos No.7013988]

http://time.com/3670647/qvc-moon-planet-or-star/

What the fuck?

[Anonymous No.7013992]

Lol had to prove KE=1/2mv^2 in my Cambridge interview

[Anonymous No.7013993]

>>7013615
>>7013810

[Anonymous No.7014017]

>>7013415
?

[Anonymous No.7014037]

>>7013415
I am so confused, I cannot get this to equal one. The answer is 16. Am I missing something here?

[Anonymous No.7014042]

>>7014037

What's your order of operations?

[Anonymous No.7014045]

>>7013415
>Kids that little knowing about multiplication, division and parentheses
Everyone who tought that was real is retarded

[Anonymous No.7014057]

>>7014037
(20/5)(4*4)
I assumed the first was a fraction written in-line.
Or was it a division sign with everything to the left of the sign in the denominator. When I work it like that I can get it to equal one.
I hate when fractions are written in-line, it causes so much confusion.

[Anonymous No.7014065]

>>7014042
(20/5)(4*4)
I assumed 20/5 was a fraction written in-line.
Or was it a division sign with everything to the left of the sign in the denominator? When I work it like that I can get it to equal one.
I hate when fractions are written in-line, it causes so much confusion.

[Anonymous No.7014075]

here are some tests I graded
i didnt just pick the funniest ones, those are simply the first 20 from a random pile without exceptions

lets see some guesses who the test was for.

[Anonymous No.7014094]

>>7014075

2

[Anonymous No.7014103]

>>7014065

Clearly altered photo. But order of operations to get 1 was 20 / (5 * (2 * 2) ).

Actual "old method" order of operations would be your way (paranthesis first, then left to right).

[Anonymous No.7014117]

>>7014075

Hard to say without knowing the refractive index.

Assuming you're testing Snell's law.

[Anonymous No.7014118]

>>7014094
its not a mirror, its a prisma with n=1.5 or something close to real glass

[Anonymous No.7014123]

>>7014117
whatever the index is, the beam does not suddenly goes sideways, splits in two or reflects at an angle

[Anonymous No.7014134]

>>7014075
Third last one?

[Anonymous No.7014144]

>>7014123

I made that statement before looking at all the diagrams.

You're right. If these kids are our future, we are doomed.

[Anonymous No.7014154]

>>7013469
You suck and you should be ashamed

[Anonymous No.7014160]

>>7013992
Lol it's a definition you were trolled, or they're dumb stupid fucks

[Anonymous No.7014161]

>>7014134
winrar

Those are medicine students btw. University, first semester. The elite of our schools which will later prescribe you 1 meter saline solution, injected at a pressure of triple lightspeed per Volt kilogram

[Anonymous No.7014165]

>>7014160

*facepalms*

i don't know where to ...

whelps. not expecting a derivation of the Einstein's energy-mass equation here ...

[Anonymous No.7014167]

>>7014161

UK type system?

US system would screen out such issues with the MCAT for medical and GRE Subjects for graduate.

[Anonymous No.7014174]

>>7010392
Ding ding ding

[Anonymous No.7014180]

>>7014167
germany
most of them dropped physics after 10th grade and in some places you can even finish school without a math exam.
there are maybe 3% promising candidates per semester who know their shit or learn hard.
the others have trouble converting liters to cubic meters and solving A=B*C for B

but the failure rates are around 50%, so after 5 semesters there will be exactly (1/2)^5 = 3% left