From: Leandro Martínez (
Date: Tue Jun 14 2005 - 10:02:28 CDT

Hi all,
When I use a tcl script to add an external force to a simulation
using namd and use the addforce command, in what units this
force is being applied? Of course, that depends on the units that
are used inside namd for the coordinates, time and masses. I would
like to be sure about that, anybody can confirm this to me?

time: time-steps (usually 1 or 2 fs, depending on my input)
masses: g / mol
coordinates: angstroms.

Thank you,

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