did you know that.

if I was stationary in space in zero g

and the pipe had a velocity of +40 m/s

I would see the pipe moving at +40 m/s.

and if the pipe were transparent I would see the mass moving at +40 m/s just before it is launched in the (-) direction toward the turn.

after the 100 kg mass has traveled the 1000 meter distance to the turn and has been accelerated to -40 m/s during the 50 second acceleration time.

the 100 kg mass would not have a velocity !!!
and it would not have momentum !!!

in fact it has been decelerated from +40 m/s to 0m/s






3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.