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4 VWO Pulsar Natuurkunde oefenvragen hoofdstuk 1: bewegen in grafieken & 2: bewegen en rekenen $3.61   Add to cart

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4 VWO Pulsar Natuurkunde oefenvragen hoofdstuk 1: bewegen in grafieken & 2: bewegen en rekenen

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Trein A rijdt met een constante snelheid van 110 km/h. Trein B komt op trein A af met een constante snelheid van 140 km/h. Op t = 0 is de afstand tussen de treinen 500 m. a) bereken hoelang het duurt totdat de treinen elkaar passeren. b) bereken de afstand die trein A en trein B hebben afgelegd op het punt dat ze elkaar passeren
Trein A rijdt met een constante snelheid van 110 km/h. Trein B komt op trein A af met een constante ...
a) t = 7,2 seconde Uitwerking: de relatieve afstand tussen de treinen = 110 + 140 = 250 km/h 250 km/h = 250:3,6 = 69,44... m/s door de formule s = vt krijg je: t = s:v, dus t = 500:69,44... = 7,2 seconde b) Trein A heeft 220 meter afgelegd Trein B heeft 280 meter afgelegd Uitwerking: bij opdracht a heb je berekend dat t = 7,2 seconde. Trein A rijdt 110 km/h = 30,55... m/s door de formule s = vt krijg je: s = 30,55... x 7,2 = 220 m Trein B rijdt 140 km/h = 38,88... m/s door de formule s = vt krijg je: s = 38,88... x 7,2 = 280 m
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