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refactor various files
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56
S1/ExPhyI/VL/VL9.typ
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56
S1/ExPhyI/VL/VL9.typ
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//2024-11-20
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#import "@preview/physica:0.9.3": curl, grad, tensor, pdv
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#import "@preview/unify:0.6.1": num,qty,numrange,qtyrange
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////////////////////////
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= Bestimmung von G mit der "Torsionsdrehwaage"
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$ s^* = 1/2 a^* t^2 $
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$ a = l/L (s^*)/(2t^2) = F/m = G M/r^2 $
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Wir haben gemessen $s^* (t)$
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Wir berechnen: $G = (r^2)/M l/(2L) (s^*)/t^2 = "3,53 x 10^-6 m^2/kg s^* t^2"$
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Tafelaufschrieb letzte Stunde: #table(columns: 2, $(s^*)/(c m)$, $t/s$, [1], [24], [4], [50], [9], [79])
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df
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- Wertepaar einsetzen $G = qty("6.13e-11", "m^3/kg/s^2)")$
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//////////////////////////
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= Planetenbahnen
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Hello
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- im Gravitationsfeld der Sonne ist die Gesamtenergie konstant
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$ E = E_p + E_("kin") $
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- der Drehimpuls $arrow(L) = arrow(r) times arrow(p)$ eines Planeten ist zeitlich konstant
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- ebene Polarkoordinaten $(r, phi)$, Ursprung in der Sonne
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$ E_("kin") = 1/2 m v^2 = 1/2 m (v_r^2 + v_phi^2) = m/2 (dot(r)^2 + (r dot(phi)^2)) $ // *
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$ arrow(L) = m ( arrow(r) times arrow(p)) = m[(arrow(r) times arrow(v)_r) + (arrow(r) times arrow(v)_phi)] = m (arrow(r) times arrow(v)_phi)) $
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$ abs(arrow(L)) = m r^2 dot(phi) = L $
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// * ->
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$ E_p + m/2 dot(r)^2 + L^2/(2 m r^2) = E = "const." $
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- Das effektive Potential (Potientelle Energie plus die Zentrifugal "energie")
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= Das Gravitationsfeld ausgedehnter Koerper
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Motivation: Rechtfertigung fuer das Benutzen von Massepunkten
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Hohle Kugeln
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hal
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ha
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this
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