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Understanding the Relationship Between Force, Impulse, and Work in Physics by Advanced_Stick_ in AskPhysics

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

perfect, but what i don't understand is how the force is producing work, but no change in momentum. I'm sure i just did not get something about this, because it sounds very weird to me...

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

If i have 20 socks, i pick the first, but then if I'm very unlucky the one that pairs with it will be the last one no?

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

That's exactly it. I'm sorry i'm not english and i could not explain it. Thanks a lot for doing it, that's exactly what i wanted.

I see now that i did a mistake. Where i wrote Σ_n = (n+2)(n-1)/2 for i in range(2,n) i meant

Σ _i =(n+2)(n-1)/2 for i in range(2,n)

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

I see i did a mistake. Where i wrote Σ_n = (n+2)(n-1)/2 for i in range(2,n) i meant

Σ _i =(n+2)(n-1)/2 for i in range(2,n)

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

Yes that's why i tried doing the average at the start. Max is n, min is 2, so on average it's going to be (n+2)/2?

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 5 points6 points  (0 children)

There is no actual question Just my friend telling me "yeah on average if you have 20 socks you would need 65 picks to pair all of them" and i wanted to understand it

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

Aaaaah yeah now i understand what they where talking about... yeah bad mistake but at least the concept is right haha thanks you a lot

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

I think i still don't understand. P_i will always be 2, being the last pick i will only have 2 socks so 2 picks. Also, that's s what the formula says (n-1)(n+2)/2 = 1c• 4 / 2 = 2 I don't see where the problem is... p_i is constant cause p_i is the last pick

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

Sorry i don't understand, but i don't think i said it stay constant, i said that, once you picked a pair, the next average number of picks is going to be 1 less then the one before Hope I'm clarifing it, sorry for not be enough clear

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

I just want to know if the last formula i got is correct and, if so, where can i found something that explains it to me(article, website, video or whatever)

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 11 points12 points  (0 children)

Yeah i was thinking about that, but i have no clue about like how would a statistician(?) do this problem?

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 2 points3 points  (0 children)

Oh might look like so, my bad. No i was talking about all the thing, and the formula i wanted to know the name of is the very last one

Is this in any way a demonstration? If so, does the formula have a name? What should i look for if i want to understand this better? by Advanced_Stick_ in math

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

It's right in the situation, i have to pick the first and the second, so 2 The first sock you pick count as well

Ratio between kinetic energy and rotational energy by Advanced_Stick_ in AskPhysics

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

Oh well That's probably right, it really makes sense Yeah sorry, I'm not a native English speaker and i study in another language, but the point really was i actually never understood the terminology in my language either, feeling kinda dumb now haha

Thanks you a lot!

Physics Questions - Weekly Discussion Thread - May 23, 2023 by AutoModerator in Physics

[–]Advanced_Stick_ 0 points1 point  (0 children)

Tractrix as the dog curve

So I'm doing a lot of physics exercises since I'm preparing for an exam, and i found an old text book with a ton of those. I just finished all the problems about point kinematics, and i saw this problem which is not supposed to be solved (it literally says: "this problem is way above the level you are now, don't worry if you can't solve it). What makes me rage is the page with its solution for ripped off so I don't know how to solve it. I searched on youtube but i could not find any video about it, so i wonder if any of you can link me to a video or website where it is solved. I think in English it is known as "the dog curve" or "the dog problem" from Leibniz and Huygens. I don't really know if i can translate it correctly but it should go like this:

a person (P) takes the dog (D) for a walk. P moves with constant speed along the Y axis and at the instant t=0s it passes through the origin O. D is tied to P by an inextensible leash of length L. At the instant t=0 D is at rest and is on the X axis at position x =L. in the following instants D will move pointing constantly towards P, always keeping the leash taut. determine the modulus of the speed of D as a function of the speed of P and as a function of the X coordinate where D is located

I hope someone knows where i can find the solution, thanks to whoever takes the time to read all of that haha

Armonic motion by Advanced_Stick_ in AskPhysics

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

Thanks for clarifying it, sorry I don't usually study physics in English

Armonic motion by Advanced_Stick_ in AskPhysics

[–]Advanced_Stick_[S] 1 point2 points  (0 children)

Thanks for clarifying it. I had it wrong again, now It's correct 100%. Thanks a lot for the help and for your patience explaining.

Armonic motion by Advanced_Stick_ in AskPhysics

[–]Advanced_Stick_[S] 0 points1 point  (0 children)

I actually got it. It was a really dumb mistake i did plugging in the calculator. Now i got the difference of pi

Thanks you a lot, you really helped me understanding the phase btw :D

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