Fizike - SHPEJTESIA DHE NXITIMI

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Last updated 10:18 AM on 7/7/26
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15 Terms

1
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shpetjesia mesatare (vmes)\left(v_{mes}\right)

  • perkufizim

  • formule (vektor dhe modul)

  • figura

vmesv_{mes} - raporti i vektorit te zhvendosjes me intervalin e kohes (madhesi vektoriale)

vmes→=Δr→Δt(ms)\overrightarrow{v_{mes}}=\frac{\overrightarrow{\Delta r}}{\Delta t}\left(\frac{m}{s}\right)

vmes=st=s(t2)−s(t1)t2−t1v_{mes}=\frac{s}{t}=\frac{s\left(t_2\right)-s\left(t_1\right)}{t_2-t_1}

vp=sptpv_{p}=\frac{s_{p}}{t_{p}}

<p>$$v_{mes}$$ - raporti i vektorit te zhvendosjes me intervalin e kohes (madhesi vektoriale)</p><p>$$\overrightarrow{v_{mes}}=\frac{\overrightarrow{\Delta r}}{\Delta t}\left(\frac{m}{s}\right)$$</p><p>$$v_{mes}=\frac{s}{t}=\frac{s\left(t_2\right)-s\left(t_1\right)}{t_2-t_1}$$</p><p>$$v_{p}=\frac{s_{p}}{t_{p}}$$</p>
2
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shpejtesia e castit (vcasti)\left(v_{casti}\right)

  • perkufizim

  • formula

vcastiv_{casti} → madhesi vektoriale qe paraqet shpejtesine e ndryshimit te zhvendosjes ne interval kohe

eshte tg me trajektoren e levizjes se pikes dhe me kah sipas drejtimit te levizjes

\overrightarrow{v_{c}}=\lim_{\Delta t\to0}\frac{\overrightarrow{\Delta r}}{\Delta t}=\frac{\overrightarrow{dr}}{\differentialD t}\left(\frac{m}{s}\right)

v_{c}=\frac{ds}{\differentialD t}\left(\frac{m}{s}\right)

3
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NXITIMI (analize)

nxitimi linear

karakterizon v lineare ne vlere numerike dhe ne drejtim

4
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NXITIMI (analize)

nxitimi mesatar

  • perkufizimi

  • formula

  • figura

  • amesa_{mes} → raporti i ndryshimit te vektorit te shpejtesise me intervalin e kohes gjate te ciles ndodh ky ndryshim

  • madhesi vektoriale

  • ames→=Δv→Δt\overrightarrow{a_{mes}}=\frac{\overrightarrow{\Delta v}}{\Delta t}

  • ames=v(t2)−v(t1)t2−t1(ms2)a_{mes}=\frac{v\left(t_2\right)-v\left(t_1\right)}{t_2-t_1}\left(\frac{m}{s^2}\right)

<ul><li><p>$$a_{mes}$$ → raporti i ndryshimit te vektorit te shpejtesise me intervalin e kohes gjate te ciles ndodh ky ndryshim</p></li><li><p>madhesi vektoriale</p></li><li><p>$$\overrightarrow{a_{mes}}=\frac{\overrightarrow{\Delta v}}{\Delta t}$$</p></li><li><p>$$a_{mes}=\frac{v\left(t_2\right)-v\left(t_1\right)}{t_2-t_1}\left(\frac{m}{s^2}\right)$$</p><p></p><p></p></li></ul><p></p><p></p>
5
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NXITIMI (analize)

nxitimi i castit

  • perkufizim

  • formula

acastia_{casti} → madhesi vektoriale

  • shpejtesia e ndryshimit te v lineare ne lidhje me kohen

  • \overrightarrow{a_{casti}}=\lim_{\Delta t\to0}\frac{\overrightarrow{\Delta v}}{\Delta t}=\frac{\overrightarrow{dv}}{\differentialD t}=\frac{d^2r}{\differentialD t^2}\left(\frac{m}{s^2}\right)

  • a_{c}=\frac{dv}{\differentialD t}=\frac{d^2r}{\differentialD t^2}\left(\frac{m}{s^2}\right)

6
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NXITIMI (analize)

komponentet perberes te nxitimit

duke qene se vektori i v eshte gjithmone tg me trajektoren e levizjes se pikes ai e ndryshon vazhdimisht drejtimin por edhe modulin/vleren numerike te tij. per kete arsye nxitimi do te kete dy komponente perberes qe do te jene:

  1. a tangencial

  2. a. normal

7
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NXITIMI (analize)

komponentet perberes te nxitimit

a normal

  • karakterizon nga ana fizike ndryshimin e drejtimit te vektorit te shpejtesise ne lidhje me kohen

  • an→=v2r⋅en→\overrightarrow{a_{n}}=\frac{v^2}{r}\cdot\overrightarrow{e_{n}}

  • an=v2ra_{n}=\frac{v^2}{r}

<ul><li><p>karakterizon nga ana fizike ndryshimin e drejtimit te vektorit te shpejtesise ne lidhje me kohen</p></li><li><p>$$\overrightarrow{a_{n}}=\frac{v^2}{r}\cdot\overrightarrow{e_{n}}$$</p></li><li><p>$$a_{n}=\frac{v^2}{r}$$</p><p></p></li></ul><p></p>
8
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NXITIMI (analize)

komponentet perberes te nxitimit

a tangencial

  • karakterizon nga ana fizike ndryshimin e vleres numerike te shpejtesise lineare ne lidhje me kohen

  • v=v⋅et→v=v\cdot\overrightarrow{e_{t}}

  • \overrightarrow{a_{t}}=\frac{dv}{\differentialD t}=\frac{d\left(v\cdot\overrightarrow{e_{t}}\right)}{dt}

  • \overrightarrow{a_{t}}=\frac{dv}{\differentialD t}\cdot\overrightarrow{e_{t}}

  • a_{t}=\frac{dv}{\differentialD t}

<ul><li><p>karakterizon nga ana fizike ndryshimin e vleres numerike te shpejtesise lineare ne lidhje me kohen</p></li><li><p>$$v=v\cdot\overrightarrow{e_{t}}$$</p></li><li><p>$$\overrightarrow{a_{t}}=\frac{dv}{\differentialD t}=\frac{d\left(v\cdot\overrightarrow{e_{t}}\right)}{dt}$$</p></li><li><p>$$\overrightarrow{a_{t}}=\frac{dv}{\differentialD t}\cdot\overrightarrow{e_{t}}$$</p></li><li><p>$$a_{t}=\frac{dv}{\differentialD t}$$</p><p></p><p></p><p></p></li></ul><p></p>
9
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NXITIMI (analize)

nxitimi i plote

  • formula

  • ap→=at→+an→\overrightarrow{a_{p}}=\overrightarrow{a_{t}}+\overrightarrow{a_{n}}

  • \overrightarrow{a_{p}}=\frac{dv}{\differentialD t}\cdot\overrightarrow{e_{t}}+\frac{v^2}{r}\cdot\overrightarrow{e_{n}}

  • ap=at2+an2a_{p}=\sqrt{a_{t}^2+a_{n}^2}

<ul><li><p>$$\overrightarrow{a_{p}}=\overrightarrow{a_{t}}+\overrightarrow{a_{n}}$$ </p></li><li><p>$$\overrightarrow{a_{p}}=\frac{dv}{\differentialD t}\cdot\overrightarrow{e_{t}}+\frac{v^2}{r}\cdot\overrightarrow{e_{n}}$$ </p></li><li><p>$$a_{p}=\sqrt{a_{t}^2+a_{n}^2}$$ </p><p></p></li></ul><p></p><p></p>
10
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levizja rrethore

  • perkufizim

  • figure

levizja rrethore → eshte levizja e kryer sipas nje rrethi ose harku rrethor me rreze r.

<p>levizja rrethore → eshte levizja e kryer sipas nje rrethi ose harku rrethor me rreze r.</p>
11
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levizja rrethore

shpejtesia kendore (w→)\left(\overrightarrow{w}\right)

  • perkufizim

  • drejtimi dhe kahu

  • formula ( w mes. dhe casti)

  • (w→)\left(\overrightarrow{w}\right) → madhesi vektoriale qe sherben per te pare orjentimin e pikave ne rreth e kahun se si rrotullohen keto pika.

  • zhvendosja kendore ne nje interval kohe

  • ka drejtim pingul me planin qe permban rrethin e vizatohet sipas boshtit te rrotullimit

  • kahu gjendet me rregullen e dores se djathte

  • wmes=ΔϕΔt(rads)w_{mes}=\frac{\Delta\phi}{\Delta t}\left(\frac{rad}{s}\right)

  • w_{c}=\lim_{\Delta t\to0}\frac{d\phi}{\differentialD t}=\frac{d\phi}{\differentialD t}

<ul><li><p>$$\left(\overrightarrow{w}\right)$$ → madhesi vektoriale qe sherben per te pare orjentimin e pikave ne rreth e kahun se si rrotullohen keto pika.</p></li></ul><ul><li><p>zhvendosja kendore ne nje interval kohe</p></li><li><p>ka drejtim pingul me planin qe permban rrethin e vizatohet sipas boshtit te rrotullimit</p></li><li><p>kahu gjendet me rregullen e dores se djathte</p></li><li><p>$$w_{mes}=\frac{\Delta\phi}{\Delta t}\left(\frac{rad}{s}\right)$$</p></li><li><p>$$w_{c}=\lim_{\Delta t\to0}\frac{d\phi}{\differentialD t}=\frac{d\phi}{\differentialD t}$$</p><p></p></li></ul><p></p>
12
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levizja rrethore

nxitimi kendore

αmes\alpha_{mes}

  • perkufizim

  • drejtimi dhe kahu

  • formula

αmes\alpha_{mes} → ndryshimi i w→\overrightarrow{w} ne interval kohe

  • madhesi vektoriale

  • αmes→=Δw→Δt=w2→−w1→Δt(rads2)\overrightarrow{\alpha_{mes}}=\frac{\overrightarrow{\Delta w}}{\Delta t}=\frac{\overrightarrow{w_2}-\overrightarrow{w_1}}{\Delta t}\left(\frac{rad}{s^2}\right)

  • kuhu dhe drejtimi perputhen me kahun e drejtimin e w→\overrightarrow{w}

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levizja rrethore

nxitimi kendore

αcasti\alpha_{casti}

  • perkufizim

  • formula

→ paraqet shpejtesine e ndryshimit te w ne lidhje ne intervalin e kohes

  • \overrightarrow{\alpha_{c}}=\lim_{\Delta t\to0}\frac{\Delta w}{\Delta t}=\frac{\overrightarrow{dw}}{\differentialD t}\left(\frac{rad}{s^2}\right)

14
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lidhja e v lineare me w

knowt flashcard image
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lidhja e a linear me α\alpha

<p></p>