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Samenvatting Systematische Natuurkunde vwo 4 - H7
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Samenvatting natuurkunde vwo 4 - H7; cirkelbewegingen
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Samenvatting natuurkunde H7 - CirkelbewegingenEenparige cirkelbeweging:
• Baansnelheid = grootte van snelheid langs cirkelbaan
• Omlooptijd (T) = tijd waarin voorwerp één ronde aflegt.
• Frequentie (f) = aantal omlopen per seconde (in Hz).
• Toerental = aantal omwentelingen per minuut.
• Middelpuntzoekende kracht (Fmpz) = resulterende kracht op voorwerp in eenparige
cirkelbeweging.
Gravitatiekracht (Fg) = wisselwerking tussen twee voorwerpen.
• Richting van kracht valt samen met lijn door de twee zwaartepunten;
• Grootte van kracht is recht evenredig met beide massa’s + omgekeerd kwadratisch
evenredig met afstand tussen zwaartepunten.
Gravitatiekracht en zwaartekracht: Fzw = Fg
m · g = G · (m · maarde) / r²
g = G · (maarde / r²)
Wet van Kepler = beschrijft baan van planeet om andere planeet (vb: planeet rond zon).
• Gravitatie kracht + middelpuntzoekende kracht (+ formule voor baansnelheid):
• Kepler: (r³ / T²) = (G · mzon) / (4π²)
Polaire baan = baan over Noordpool en Zuidpool.
Geostationaire baan = stilstaand boven evenaar.
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