Also called Path Length or Measured Length.
Distance l between two points of Trajectory {\bf r}(l)
| (1) | l = \int_0^l \sqrt{dx^2 + dy^2 + dz^2} = \int_0^l \sqrt{\dot x^2 + \dot y^2 + \dot z^2} dl |
where
{\bf r}(l) | position vector of trajectory points |
l | path length from reference point {\bf r}_0 = \{ x_0 = 0, \, y_0 = 0, \, z_0 = 0 \} |
See also
Natural Science / Physics / Measuring / Positioning / Trajectory
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