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antwoorden natuurkunde (newton) Hoofdstuk 11 VWO5
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11 VaardighedenWiskunde in de natuurkunde | vwo
Uitwerkingen basisboek
11.1 REKENVAARDIGHEDEN
1
a ( ).
b .
c .
2
a √ ( √ )
.
b √ .
( )
c
( )
(in rekenmachine
laten staan!) √ ( ) .
3
e
a De remkracht blijft gelijk en de beginsnelheid is 90/50 = 9/5 keer zo groot. De
remweg is evenredig met , dus is ( ) .
b De beginsnelheid blijft gelijk en de remkracht wordt 6,5/8,4 keer zo groot. De remweg
is omgekeerd evenredig met de remkracht, dus is .
4
a De omtrek is dus (in
rekenmachine laten staan!). De oppervlakte is dus
.
b Maak een tekening:
Pythogoras: √ .
De omtrek is .
De oppervlakte is .
c De straal van de bal is 14 cm.
Het volume van de bal is .
De oppervlakte van de bal is .
d Het volume van een cilinder is dus
√ . De diameter is dus 60,0 cm.
5 De springdrum wordt in de hand gehouden, dus de hoogte zal ongeveer 10 cm zijn. Op de
foto is de golflengte ongeveer 2 keer zo groot als de springdrum. We schatten de
golflengte dus op 2 x 10 = 20 cm. De frequentie is dan
© ThiemeMeulenhoff bv CONCEPT Pagina 1 van 15
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