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Samenvatting Berekenen van vermogen, rendement en zwaarte-energie

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In deze samenvatting staan de formules voor het berekenen van het rendement, vermogen en de zwaarte-energie uitgewerkt met voorbeelden en oefenvragen.

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Zwaarte-energie berekenen
E z=m∙ g ∙ h

E z=de zwaarte−energie ∈ joule (J )

m=de massa van het voorwerp∈kilogram(kg)
g=de zwaarteconstante∈newton per kilogram( N / kg)
h=de hoogte(verandering)∈meter (m)
Voorbeeld:
Een kist van 20 kilo 2 meter hoger geplaatst. Bereken de zwaarte-energie.
Wat weten we:
m=20 kg
g=9,81 N /kg
h=2 m
Bereken:
E z=20 ∙ 9,81 ∙2

E z=392.4 J

Zelf oefenen:
Maak in je schrift de volgende berekeningen (af).
1) Een voorwerp van 32,52 kg wordt 2,23 omhoog geplaatst. Bereken de zwaarte-
energie.
Wat weten we:
m=32,52 kg
g=9,81 N /kg
h=2,23
(Maak nu de berekening in je schrift)
2) Een voorwerp van 3,83 kg wordt 84 meter omhoog geplaatst. Bereken de zwaarte-
energie.
(maak nu in je schrift eerst de ‘’wat weten we’’ en daarna de berekening)
3) Een voorwerp van 5,342 kg moet 3,45 meter omhoog worden verplaatst. Bereken
hoeveel zwaarte-energie dit gaat kosten.
(maak de volledige berekening in je schrift. Je mag ‘’wat weten we’’ overslaan als je dat niet
nodig hebt)

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School year
3

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Which chapters are summarized?
H5.1 berekeningen
Uploaded on
September 2, 2021
Number of pages
5
Written in
2019/2020
Type
SUMMARY

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