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De raderboot
Voorbeeld van een as dat een wiel draait
DOELSTELLINGEN
De leerlingen:
1. Ontdekken hoe een as dat een wiel draait de afgelegde afstand en snelheid vergroot.
2. Onderzoeken de relatie tussen de vergroting van het wiel en de afgelegde afstand.
WERKWIJZE
Introductie
Breng in de herinnering dat bij de put een wiel een as draaide en daardoor de kracht vergrootte.
Leg uit dat de leerlingen nu een nieuwe toepassing gaan onderzoeken. Ze gaan een raderboot bouwen en
ontdekken hoe wiel en as de arbeid van de boot- varen door water- makkelijker maken. Wijs de klas op de
foto van de raderboot in het instructieboek.
Vraag de klas of ze weten waar
raderboten gebruikt worden. Laat
iemand uitleggen hoe deze werken.
MATERIALEN
Materialen per 2-3 leerlingen:
- 1 set K’NEX Education Wielen,
Assen en Hellende Vlakken
met instructieboek
- 2 blokjes hout of piepschuim
- werkschriften
- stevig elastiek
- watertafel of bak
een machine draait de as, die het grote wiel laat draaien.
De raderboot
WIELEN EN ASSEN
www.knexeducation.com
Education
®
17


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