> You still have a sign error. The radiation reaction force Fr is 
> proportional to -jerk.

There is no error, Tom.

> 
> > For example, if gravitational force was proportional to
> > the r^2, then Frad would be in the direction of the acceleration,
> > since it is inversly proportional, it is in the opposite direction.
> 
> For a falling object dr/dt < 0, so it is falling into a region of 
> INCREASING force in the -r direction, which means increasing 
> acceleration DOWNWARD, so the jerk is pointing DOWNWARD. Fr must of 
> course point upward.

Tom, you are wrong.

If a(r) = 1/r^2, then the jerk is in the OPPOSITE DIRECTION. Think
about it.

Or, do the math.

d a(r)/dr = - 1/r^3

The snap is in the same direction as the acceleration, and the crackle
the same as the jerk. But what about the pop?