NDSolve in 3D
- To: mathgroup at smc.vnet.net
- Subject: [mg126295] NDSolve in 3D
- From: Niles <niels.martinsen at gmail.com>
- Date: Sun, 29 Apr 2012 02:10:28 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Hi
I am trying to solve Newtons equation for a particle in (x, y, z), and here is what I have:
sol = NDSolve[{
x''[t] == acceleration[x'[t], y[t], z[t]],
y''[t] == acceleration[y'[t], x[t], z[t]],
z''[t] == 0,
x[0] == 0, x'[0] == 0, y[0] == 0, y'[0] == 0, z[0] == 0,
z'[0] == 250},
{x[t], y[t], z[t]}, {t, 0, 1}];
There is only a force acting in the (x, y)-direction, and the z-component is just constant (not accelerating). When I plot the solution using
ParametricPlot[{x[t], x'[t]} /. sol, {t, 0, 0.001},
PlotRange -> {{0, 0.35}, {0, 5}}, AspectRatio -> 0.75]
the plot is empty. Is my syntax in NDSolve correct?
Best,
Niles.