Re: Some propellantless propulsion fun

Greg Neill wrote:
Look, why don't you just say that the ball is given
a brief impulse that launches it at a certain velocity?
That would cut out all this business dealing with the
specifics of the acceleration mechanism.

You need the acceleration to find out the force the
box would be pushed back with.
Or do you wish to remove acceleration from the problem
now?

Since the ball launcher is attached to the container
it's a valid question. In order for it to be able
to apply a constant acceleration from the point of
view of an external observer, it needs to adjust its
force to compensate for the reaction movement of the
container its attached to; the force will not be
constant over time.

Wow.
you are finally getting some more of it now.
You now understand the "force" the smaller mass
will have will not be "constantly applied" while the
friction occurs.
Now you may actually be figuring out why it will work.
:)

--
James M Driscoll Jr
Spaceman


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