Formule spidi Flashcards

1
Q

Amplituda slaganjem 2 oscilacije jednakih frekvencija

A

x0^2 = x01^2 + x02^2 + 2x01x02cos(fi01-fi02)

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2
Q

Početna faza složene oscilacije

A

tg fi_0 = (x01 sinfi_01)(x02 sinfi_02)/(x01 cosfi_01)(x02 cosfi_02)

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3
Q

Period pulsiranja (ugaone frekv. su približno jednake)

A

T = 2 Pi/|w1-w2|

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4
Q

Amplituda za jednake dve početne osc.

A

A = |2x0 cos(deltawt)|

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5
Q

Amplituda prigušenih oscilacija kad je prigušenje zanemarljivo

A

x0 = F0/m|w0^2-w^2|

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6
Q

Rezonantna ugaona frekvencija

A

w_r = sqrt(x_0^2 - 2beta^2)

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7
Q

Amplituda pri rezonanciji

A

x_0 = F_0 / 2mbetasqrt(x_0^2-2beta^2)

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8
Q

Sila otpora sredine

A

F = bv

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9
Q

Koeficijent prigušenja

A

beta = b/2m

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10
Q

Jednačina prigušenih oscilacija

A

x = x_0 e^(-beta t) sin(w*t + fi_0)

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11
Q

Sopstvena frekvencija

A

w_0 = sqrt(k/m)

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12
Q

Ugaona frekvencija prigušenih osc

A

w* = sqrt(w_0^2-beta^2)

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13
Q

Promena amplitude zbog prigušenja

A

A = x_0 e^(-beta t)

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14
Q

Q-faktor

A

sqrt(mk)/2Pib

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15
Q

Period prigušenja el. osc.

A

T = 2Pi / sqrt(1/LC - R^2/4L^2)

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