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Samenvatting Natuurkunde Arbeid en energie + herhaling
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Overzichtelijk alle belangrijke informatie uit hoofdstuk Arbeid en energie voor vwo 5, samen met herhaling van vwo 4.
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Nina van Veen - A5Natuurkunde
Arbeid
2, 3, 7
&8
En herhaling
, 8.1 Arbeid
Aantekeningen
Arbeid = de energie die een kracht verricht op een voorwerp
𝑊 = 𝐹 ⋅ 𝑠 ⋅ cos(𝛼) → hoek tussen de kracht en de afstand
cos (0) = 1
cos (90) = 0
cos (180) = -1
𝑊 = 𝐹𝑧 ⋅ 𝑠 ⋅ cos 𝛼
𝑊 = 𝑚 ⋅ 𝑔 ⋅ 𝑠 ⋅ cos 𝛼
𝑊 = 𝑚 ⋅ 𝑔 ⋅ Δℎ
Arbeid zwaartekracht afhankelijk van verschil hoogte
Arbeid wrijvingskracht afhankelijk van afstand
8.2 Energievormen
Aantekeningen
Energie en arbeid kan je 1 op 1 uitwisselen
1
Kinetische energie 𝐸𝑘𝑖𝑛 = 2 ⋅ 𝑚 ⋅ 𝑣 2
Chemische energie 𝐸𝑐ℎ𝑒𝑚 = 𝑟𝑚 ⋅ 𝑚 𝑜𝑓 𝑟𝑣 ⋅ 𝑉 BiNaS 28B (stookwaarden)
Zwaarte energie 𝐸𝑧 = 𝑚 ⋅ 𝑔 ⋅ ℎ
Warmte 𝑄 = 𝐹𝑤𝑟 ⋅ 𝑠
Iets heeft kinetische energie als het voorwerp in beweging is
Iets heeft zwaarte energie als het voorwerp op een bepaalde hoogte boven de grond is.
Energiesoorten kunnen verdeeld worden in twee groepen:
• Kinetische energie samenhangend met snelheid
• Potentiële energie samenhangend met plaats
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