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\begin_layout Title
Stoječe valovanje na vrvi
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\begin_layout Author
\noun on
Anton Luka Šijanec
\end_layout
\begin_layout Date
25.
januar 2023
\end_layout
\begin_layout Abstract
Poročilo sedme vaje pri predmetu
\noun on
F41
\noun default
na Gimnaziji Bežigrad v 4.
letniku.
Vaja je potekala 8.
decembra 2022.
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\begin_layout Section
Naloga
\end_layout
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S stoječim valovanjem ugotovi, kako je hitrost valovanja na vrvi odvisna
od sile, ki napenja vrv.
\end_layout
\begin_layout Section
Potrebščine
\end_layout
\begin_layout Itemize
brnač
\end_layout
\begin_layout Itemize
ŠMI
\end_layout
\begin_layout Itemize
vezna žica (2)
\end_layout
\begin_layout Itemize
prižema s škripcem
\end_layout
\begin_layout Itemize
vrvica (2)
\end_layout
\begin_layout Itemize
uteži po
\begin_inset Formula $\SI{10}{\gram}$
\end_inset
(6)
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\begin_layout Section
Potek dela
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\begin_layout Enumerate
En konec debelejše vrvice pritrdi na brnač, ki vzbuja na vrvici nihanje
s stalno frekvenco
\begin_inset Formula $\SI{50}{\hertz}$
\end_inset
.
Brnač priključiš na ŠMI na izmenično napetost
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\end_inset
.
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Drugi konec vrvice napelji preko škripca in obesi nanjo kaveljček za uteži
in eno utež (skupna masa
\begin_inset Formula $\SI{20}{\gram}$
\end_inset
).
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Ko vključiš ŠMI, da brnač zaniha, počasi spreminjaj dolžino vrvice med brnačem
in škripcem tako, da dobiš na vrvici lepo stoječe valovanje.
Določi valovno dolžino tega stoječega valovanja.
\end_layout
\begin_layout Enumerate
Postopoma dodajaj uteži na kaveljček, vsakič poišči ustrezne stoječe valovanje
te določi valovno dolžino.
Vse meritve zapisuj v ustrezno tabelo.
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Meritve debele vrvice
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Meritve tanke vrvice
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LatexCommand label
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Tabelo dopolni tako, da bo iz nje razvidno, kako se hitrost valovanja na
vrvi spreminja s silo, ki napenja vrvico.
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Nariši graf, ki kaže odvisnost iz točke
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reference "enu:Tabelo-dopolni-tako,"
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, ter z besedami in/ali z enačbo povej, za kakšno odvisnost gre.
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Odvisnost valovne dolžine od sile, s katero je vrvica napeta.
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debela.csv" using 4:5 via p, c
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\begin_deeper
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\begin_inset Formula $f$
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je frekvenca nihanja
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\begin_layout Enumerate
\begin_inset Formula $v$
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je hitrost potujočega valovanja po vrvi
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\begin_layout Enumerate
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je masa vrvice dolžine
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je sila, s katero je vrvica napeta
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je dolžina vrvice
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Če imaš čas, ponovi cel postopek še s tanjšo vrvico.
Odvisnost iz točke
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reference "enu:Tabelo-dopolni-tako,"
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nariši v isti koordinatni sistem kot za debelejšo vrvico ter komentiraj
rezultat.
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Valovna dolžina tanjše vrvi je za faktor
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večja od debelejše vrvi.
V idealnem primeru bi na to vplivala njena dolžinska gostota, saj drži
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.
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Uporabljen program
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