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Achterbahn
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Bei einer Achterbahn wird ein Wagen mit der Masse m = 300 kg eine Rampe hinaufgefahren. Von der Rampe rollt der Wagen reibungsfrei hinab und trifft auf einen Looping mit einem Radius von 5m. a) Mit welcher Geschwindigkeit v muss sich der Wagen am höchsten Punkt des Loopings mindestens bewegen, um nicht herabzufallen? {{Lösung| Verwende Formeln {{Quelle|PhIng|2.8}}{{Quelle|PhIng|3.24}}{{Quelle|PhIng|1.15}}(senkrecht) <source lang="mathematica"> Fg = m g Fz = m \[Omega]^2 r \[Omega] = v/r N[m] = 300; N[r] = 5; N[g] = 9.81; G1 = Fg == Fz v = v /. Solve[G1, v][[2]] N@v </source> also [[Zahlenwert::7]] [[Einheit:m/s]]}} b) Angenommen, der Looping endet am höchsten Punkt: Wie weit würde der unbemannte Wagen von dort aus fliegen? {{Lösung| Formeln {{Quelle|PhIng|1.7}} {{Quelle|PhIng|1.11}} <source lang="mathematica"> N[r] = 5; N[g] = 9.81; y[t_] = 2 r - 1/2 g t^2 x[t_] = v t tMax = t /. Solve[y[t] == 0, t][[2, 1]] x[tMax] N[%] </source> also 10 Meter. }} {{Klausuraufgabe |KADatum=SS08 |KAAufgabe=2 |KAAbschnitt=MSW |KAPunkte=7 }}
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