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Re: Misner, Thorne and Wheeler, Exercise 8.5 (c)
Posted:
Apr 9, 2013 2:57 AM


"Hetware" <hattons@speakyeasy.net> schreef in bericht news:Duidna9WrZBIBv7MnZ2dnUVZ_rydnZ2d@megapath.net... > On 4/8/2013 9:27 AM, Dirk Van de moortel wrote: >> Hetware <hattons@speakyeasy.net> wrote: >>> This is the geodesic equation under discussion: >>> >>> d^2(r)/dt^2 = r(dp/dt)^2 >>> >>> d^2(p)/dt^2 = (2/r)(dp/dt)(dr/dt). >>> >>> r is radius in polar coordinates, p is the angle, and t is a path >>> parameter. >>> The authors ask me to "[S]olve the geodesic equation for r(t) and >>> p(t), and show that the solution is a uniformly parametrized straight >>> line(x===r cos(p) = at+p for some a and b; y===r sin(p) = jt+k for >>> some j and k). >> >> Normally we'd write dotted variables, but with quotes it's easier. >> So write > > Like this? > > <math xmlns='http://www.w3.org/1998/Math/MathML'
[snip]
This is a text group :)
Dirk Vdm


Date

Subject

Author

4/7/13


Guest

4/7/13


Lord Androcles, Zeroth Earl of Medway

4/8/13


Lord Androcles, Zeroth Earl of Medway

4/8/13


Hetware

4/8/13


Lord Androcles, Zeroth Earl of Medway

4/8/13


Hetware

4/9/13


Lord Androcles, Zeroth Earl of Medway

4/9/13


Hetware

4/8/13


Hetware

4/8/13


Lord Androcles, Zeroth Earl of Medway

4/9/13


Hetware

4/9/13


Lord Androcles, Zeroth Earl of Medway

4/9/13


Hetware

4/9/13


Lord Androcles, Zeroth Earl of Medway

4/9/13


Hetware

4/8/13


Dirk Van de moortel

4/8/13


Lord Androcles, Zeroth Earl of Medway

4/8/13


rotchm@gmail.com

4/9/13


Dirk Van de moortel

4/13/13


Dono

4/13/13


rotchm@gmail.com

4/13/13


Dono

4/13/13


Dono

4/13/13


Dono

4/13/13


rotchm@gmail.com

4/13/13


Dono

4/13/13


rotchm@gmail.com

4/13/13


Dono

4/13/13


Dono

4/13/13


rotchm@gmail.com

4/13/13


Dono

4/13/13


rotchm@gmail.com

4/13/13


Dono

4/9/13


Guest

4/9/13


Dirk Van de moortel

4/9/13


Lord Androcles, Zeroth Earl of Medway

4/8/13


Rock Brentwood

4/8/13


Hetware

4/8/13


Lord Androcles, Zeroth Earl of Medway


