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3
CJL/etymologie
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@ -1,3 +0,0 @@
Jméno Lukáš: Lucas pochází z latinského názvu jihoitalské oblasti Lukánie a označuje jejího obyvatele.
Příjmení Mašata: je odvozeno z osobních jmen, která začínají na Ma-: především Matěj, dále Mauritius, apod. Základním příjmením je Máša

9
ELE/2024-11-13-odpory.txt
View File

@ -1,9 +0,0 @@
12/11 = 2A
R*I = U
R:
2*2 = 4
4*2 = 8
5*2 = 10

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2
ELE/du/du.kicad_pcb
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(kicad_pcb (version 20240108) (generator "pcbnew") (generator_version "8.0")
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83
ELE/du/du.kicad_prl
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11
ELE/převody-du.txt
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@ -1,11 +0,0 @@
2000 mAh = 2Ah = 7200 C
20 kwh = J
15 mC = Ah
86000 J = wh
1000 mAs = mAh
10MJ = kwh
P = w * t
w = P / t

2
FYZ/2024-11-04-volný-pád.txt
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@ -8,8 +8,6 @@ v = g*t
s = 1/2*g*t² s = 1/2*g*t²
s = 1/2*g*t² + v₁t
klič pada 20m klič pada 20m
v = √2sq v = √2sq

40
FYZ/2024-11-11-rovnomerny-pohyb-po-krznici.txt
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@ -1,40 +0,0 @@
Rovnomerny pohyb po krznici
periodicky pohyb
T perioda (doba oběhu)
[T] = s
f frekvence
[f] = Hz
f = 1/T
rychlost
→
v ma velikost a smer
v = const
s = r * f
Φ merime v radianech rad 1 rad: delka
1 rad = 57°18'
uhova rychlost
→
ω
ω = ΔΦ/Δt
[ω] = rad/s
ω = 2pi/T = 2pi*f
v = s/t = pi*Φ/t
v = pi*ω
hmotny bod kona rovnomerny pohib po kruznici o polomeru 0,5m s frekvenci 4Hz
vypocitejte: obeznou dobu
0.25s
uhlovou rychlost
25.133 rad/s
rychlost
f*T = 1
T = 1/f
T = 0.25s

52
FYZ/2024-11-11.txt
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@ -1,52 +0,0 @@
kroupy padají na ze rychlosti 100m/s, Z jake vysky padaji
s = 1/2*g*t²
v= g*t
100 = 10 * t
t = 10s
s = 1/2*10*100
s = 500m
jak hluboká je propast jestly že volně padajíci oběkt pada na zem 5.25s
s = 1/2*10*27,562i
s = 137.81m
Skládání pohybů
po vodorovne trati jede vlak stalou rychlosti 15m/s kapky padaji ve svislemm smeru ryhlosti 8m/s
a) rychlost kapek vzhledem oknům vlaku
b) uhel ktery sviraji stopy kapek na okně
61.928
v₁ = vlak 15m/s
v₂ = kapky 8m/s
tg alfa = v₁/v₂
alfa = 61.928
v = √25² + 8²
v = 17m/s
clun se pohybuje vzhledem vode 13m/s vodni proud je 5m/svislemm
a) pod jakým uhlem vzhledem k vodnimu produ
112°37'
b) jak rychle jede k druhemu brehu
12m/s
v = √(13² - 5²)
v = 12m/s
v1 = 13m/s
v2 = 5m/s
sin beta = 5/13
beta = 22°37'
alfa = 112°37'

110
FYZ/2024-11-18-rovnomerny-pohyb-po-kruznici.txt
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@ -1,110 +0,0 @@
pr1
jaka je uhlova rychlost bodu hovnomerne se otacejicicho kola auta
o prumeru 60cm jedely auto rychosti 90km/h? S jako frequenci se kolo otaci
kolik otacek ta min kolo vikona?
r = 0.3
v/r = ω
ω = 83.33 s⁻¹
ω = 2pi*f
{f} = 83.3/2pi
1. 13.3Hz
2. 798ot za mine
vypočtete delku oblouku ktery opise konovi bod delsi rucicky dlouhe 10cm velkych
hodin, uplineli 20min
r = 0.1m
t = 20min = 1/3h
l = 1/3 * 2pi*r
l = 0.21m
Remenice elektromotoru ma polomer 3cm a pohani remenovim pohonem kolo o polomeru 15cm. S jakou frequenci se otaci toto kolo jely frekvence elektromotoru 50Hz?
r = 0.003
f = 50Hz
f₂/f₁ = r₁/r₂
f = 10Hz
vypoctete uhlovou rychlost otaceni zemne a rychlost s jakou se pohybuji
body na rovniku
ω = 2pi/T
{ω} = 2pi/24*3600
ω = 7,3*10⁻⁵
v = 6378 *10⁻³ * 7.3*10⁻⁵
v = 466 m/s
Zrychleni pohybu po kruznici
zrychleni zmena rychlosti za caš
v₁ = v₂
→
v meni zrychleni
→
aˇd = v²/r = ω²*r
pr1
pracka ma rychlost otacek 1000 oacek Za min
a) frekvence otaceni
f = 1000/60 = 17Hz
b) velikost dostrediveho zrychleni, jeli prumer 40cm
a = ω²r = (2pi*f)² * r = 4pi²f²r
a = 2193
auto projizdi zatackou o polomeru 100m rychlosti 72km/h vypočete jeho do stredive zrychleni
v = 20m/s
r = 100m
a = 400/100 = 4m*s⁻²
zeme kolem
slunce
v = 3*10⁴
{a} = 3*10⁴/149,6*10
pr
za jako dobu pri volnem padu okamzite rychlosti z 10m/s na 30m/s
jako drahu urazi
20 = 10 * t
2s = t
a) 2s
b)
1/2 * 10 * 4 + 10 * 2
40m

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