/sci/ - Science & Math

[Anonymous No.10382028]

hmmm...

[Anonymous No.10382034]

>>10382028
100N

[Anonymous No.10382047]

>>10382034
lmao

[Anonymous No.10382080]

>>10382034
this desu

[Anonymous No.10382087]

>>10382047
lmao

[Anonymous No.10382129]

>>10382087
lmao

[Anonymous No.10382139]

one hundred lmao's

[Anonymous No.10382142]

it's the same as fixing one end and doubling the mass in the other. 200n.

[Anonymous No.10382147]

>>10382034
>>10382142
imagine someone trying to measure the Newtons of a punch.

He hits the thing and it registers 100 N.
now what if someone were to grab his arm and pull at the force of 100 N?
he wouldnt even fucking hit it. it would be 0

brainlets

[Anonymous No.10382149]

>>10382142
Lmao

[Anonymous No.10382152]

>>10382034

[Anonymous No.10382155]

>>10382147
lmao

[Anonymous No.10382157]

what sort of retarded metric scale reads in Newtons and not kg. It would read 20.38kg if anything

[Anonymous No.10382158]

>>10382147
>brainlets
lmao
he is right lmao

[Anonymous No.10382162]

>>10382157
its the future, where life resides on planet mars

[Anonymous No.10382172]

>>10382162
You're really putting the Ayy in the Lmao

[Anonymous No.10382174]

What a stupid fucking thread
>there are people here who cannot do a static analysis

[Anonymous No.10382177]

>>10382174
>tfw took statics, solid mechanics, and now in dynamics
>I see FBD's in my sleep
>help me

[Anonymous No.10382188]

>>10382177
>solid mechanics
Is this strength of materials?

[Anonymous No.10382195]

>>10382188
stress and stress transformation, strain and strain transformation, mechanical properties of materials, axial load, torsion, bending, transverse shear, combined loading, pressure vessels, failure theories, stress concentrations, thermal stress, deflection of beams and shafts, and column buckling

[Anonymous No.10382203]

>>10382195
So yes

[Anonymous No.10382205]

why would it matter which side of the spring you pulled on? The total pulling on the spring is 200N.

[Anonymous No.10382216]

>>10382205
Brainlet

[Anonymous No.10382218]

>>10382205
Every force has an equal and opposite force.

Dynamometer fastened on roof.
Pull down 100N.
It shows 100N.
But there is 2nd force. Woooooow.
That force is up 100N.

Now pull left 100N.
But also pull right 100N.
Same as first example.
Shows 100N. Woooooow

[Anonymous No.10382239]

>>10382205
If you don't pull on the other site the thing will not stay in place

[Anonymous No.10382253]

>>10382218
nope. think of a scale. If you weigh 200lb, why doesn't it then show 400lb? It's being squeezed with 400lb of force.

In reality, scales show half of what they actually measure.

[Anonymous No.10382339]

The answer is 100N. Imagine: first you hold the dynamometer with your hand, you put the first weight, the scale shows 100N. Then you just put the other weight, which clearly changes nothing.

[Anonymous No.10382345]

>>10382253
If you weight 200 lbs and stand on a scale, the scale is being squeezed by 200 lbs FROM BOTH SIDES
>mfw responding to bait and or children

[Anonymous No.10382347]

>>10382339
shhhh don’t tell them

[Anonymous No.10382483]

>>10382028

It's obviously 0, the scale measure THE DIFFERENCE between what is anchored to it and what is pulling it.

[Anonymous No.10382500]

>>10382028
The scale stays in place and so the acceleration is zero. Since acceleration and force are proportional (by Newtons second law) the force is 0.

[Anonymous No.10382514]

>>10382034
>>10382047
>>10382080
>>10382087
>>10382129
>>10382139
>>10382142
>>10382147
>>10382149
>>10382152
>>10382155
>>10382157
>>10382158
>>10382162
>>10382172
>>10382174
>>10382177
>>10382188
>>10382195
>>10382203
>>10382205
>>10382216
>>10382218
>>10382239
>>10382253
>>10382339
>>10382345
>>10382347
>>10382483
>>10382500
Lmao

[Anonymous No.10382537]

>>10382028
Its 200N. I dont give a fuck if you reply with “lmao”, any other answer is objectively wrong.

[Anonymous No.10382544]

>>10382028
Newtons are not a measurement of weight.

[Anonymous No.10382546]

>>10382537
lmao

[Anonymous No.10382560]

>>10382544
/thread

[Anonymous No.10382565]

>>10382028
They cancel each other out

[Anonymous No.10382583]

>>10382544
>>10382560
Don't /thread yourself faggot. Your post is retarded.
Lmao

[Anonymous No.10382587]

>>10382537
Feel free to do the expirement and find out you are wrong
>>10382544
>weight is a force
>Newton is a unit of force
Hmmm...

[Anonymous No.10382608]

I don't know if people are seriously arguing over this or if its just a bunch of trolls circlejerking.

[Anonymous No.10382800]

>>10382537
so if i pinch this it suddenly drops to 100N?

[Anonymous No.10382805]

>>10382800
now your fingers are measuring 200N, so the scale will drop to 50 (half of 100)

[Anonymous No.10382826]

>>10382805
my fingers are just making this situation.

[Anonymous No.10382831]

>>10382805
audibly kekked, anon

[Anonymous No.10382910]

Why doesn't someone just do it in real life holy shit. This isn't on the same tier as the portal problem you can literally just do it yourself.

[Anonymous No.10382929]

jesus christ I hate and love you motherfuckers so much

[Anonymous No.10382936]

>>10382028
>take this type of scale (or a spring- it's literally the same)
>grab with both hands and apply 100N (~10kgf) in each direction
>scale shows 20kgf (~200N)
Literally take a spring and stretch it, retards. Wtf is this?

[Anonymous No.10382948]

>>10382800
>>10382826
Pinch the other end too, it's zero

[Anonymous No.10382963]

> be able to solve maxwell equations
> cant solve a basic force problem

the absolute state of physicists

[Anonymous No.10383081]

Here, you bainlet fags : https://youtu.be/YTPOEKHEBXY

[Anonymous No.10383491]

tl;dr
lmao

[Anonymous No.10383511]

>>10382147
lol? what you describe is a total different situation you fucking idiot. It will show 100N
brainlet

[Anonymous No.10383605]

>>10383081
Thank you Anon

Now I know I'm stupid but at least I know how

[Anonymous No.10383640]

>>10382177
Are you 12? That's some first year shit.

[Anonymous No.10383653]

>>10383081
>
I knew it. I feel like a genius

[Anonymous No.10383694]

>>10383081
>tfw I was right and /sci/ was wrong

[Anonymous No.10383707]

>>10382800
Does the pinch remove the strings tension?

[Anonymous No.10383715]

>>10382028
Y'all retarded or what?
OMFG it shows 0 faggots. Time to get off this fuckin board. Brainlets

[Anonymous No.10383724]

>>10382253
>lb

[Anonymous No.10383827]

>>10383715
lmao its actually 0

[Anonymous No.10383839]

>>10382028
0 newton
watch the strings closely. they are not taut. this experiment take place in zero gravity.

[Anonymous No.10383930]

>>10382028
Wouldn't it be 100 since the right block is essentially acting as the ceiling?

[Anonymous No.10384055]

lmao

[Anonymous No.10384059]

>>10384055
Lmao

[Anonymous No.10384820]

lmao, what would happen if you pull both of the strings with your hand and same strenght?

[Anonymous No.10384832]

doesn't it read ~160?

[Anonymous No.10384834]

>>10383707
No, it changes nothing

[Anonymous No.10384887]

>>10383081
Hold up, doesn't that mean that it's displaying only half the force that's actually being applied to it?

[Anonymous No.10384891]

>>10384887
No

[Anonymous No.10384904]

>>10384891
But as he explained it, if you're holding the other end of the string then there's being applied a force of 10N from that direction while the bottle itself is applying a force of 10N in the opposite direction. So why isn't it displaying 20N?

[Anonymous No.10384909]

>>10384904
If you hold the string in one hand and dangle 10 N from the other, the exact same forces are on the spring as in the situation in the video. It displays 10 N because there is 10 N tension in the string

[Anonymous No.10384922]

>>10384909
I understand that the two scenarios are equivalent but I don't understand how there isn't being applied a force of 20 N. In the second example, two forces are tugging at the scale, each one 10 N, so why isn't the total force being applied 20 N.?

[Anonymous No.10384926]

>>10384904
the question is asking what force is being applied to the scale specifically, not what force is being applied to/by all objects.

[Anonymous No.10384932]

>>10384922
Because the scale measures only the force applied at the hook

[Anonymous No.10384934]

>>10384922
the spring absorns the extra 10N, and if you held it at that compression and moved it over to a scale and let go it would push on the scale with 10N force.

[Anonymous No.10384953]

>>10384934
I'm not entirely sure I understand fully. I'd be nice to have a diagram of all the forces that're being applied to the scale.

[Anonymous No.10384960]

>>10384953
I have a hard time drawing springs, sorry.

[Anonymous No.10384974]

>>10384953
The blue thing s the scale and has no mass. 10 N is applied in both direction direction. That's all of the forces.

[Anonymous No.10384985]

>>10384974
Right, so why isn't measuring 20 N?

[Anonymous No.10384991]

>>10384985
You're basically asking
>why doesnt 10 N equal 20 N

[Anonymous No.10384992]

>>10383081
I had a feeling it was 100N but you this fucker trolled me >>10382152
and I started second guessing myself lmaoo

[Anonymous No.10385003]

>>10384991
In that diagram, two separate forces of 10 N are being applied, in total that's 20 N. Explain to me why this reasoning is wrong.

[Anonymous No.10385019]

>>10385003
First off all, forces don't add like numbers, they are vectors. If you want to get technical, the total force on the scale is 0 (because it is in equilibrium and no accelerating). When a scale measures a force F acting on it, that indicates there must be a force -F keeping it in equilibrium, by definition.

[Anonymous No.10385035]

>>10382028
So, it's basically just two weights attached to a spring. Now remove one of the weights and have a person holding one end of the spring. The person is clearly applying 100N of force but that's just counteracting the force of the remaining weight and the scale reads 100N. Now replace the person with a weight applying the same 100N force and the reading doesn't change.

[Anonymous No.10385038]

>>10385019
Alright thanks, I guess I have to learn how vectors work.

[Anonymous No.10385055]

>>10382177
>In dynamics and circuit analysis
>see friction pulley problems in my sleep
>about to fuck a girl in my sleep
>try to measure the voltage drop from her tits to her pussy
>wtf

[Anonymous No.10385059]

>>10385038
The way a spring works is you have to apply a force in each direction or it'll just accelerate, so the size of this bidirectional force is what the scale is measuring.

[Anonymous No.10385068]

>>10385059
>The way a spring works is you have to apply a force in each direction or it'll just accelerate
I mean, when you formulate it like that it seems extremely obvious and I don't know why I didn't realise it sooner.

[Anonymous No.10385111]

L

[Anonymous No.10385185]

>>10385019
This is exactly why the answer is 100 and not 200. If the scale were attached to a wall on one end and had a single 100 lb weight, it would experience 100 lb at both ends because of newtons third law, which most people in this thread don't seem to have a full grasp of. If there are two weights and both are 100 lb, that is the same thing as there being one weight and a wall. The second weight would pull with the exact force as the wall, so it's effectively an equal situation. The scale itself measures the stretch of the spring, which is proportional to the force applied to it. Certain lengths correspond to certain forces. If it were pulled with 100 N or 100 lb or whatever on one side, it would automatically get pulled by 100 on the opposite side. The scale would stretch to the mark corresponding to 100 in both scenarios because they are effectively the same.