thats what I meant when I said the greater force overcomes the lesser force.

the force generated by the air moving through the nozzle is all directed in one direction.

the force applied to the sides would not cause the pipe to move at all because all sides would feel the same force.

the tiny force that is capable of reaching the end will not slow the pipe to any extent.

so the pipe accelerates , and just keeps going.

Imagine it's millions of ball bearings instead of air. Then what'll happen to them?

if a ball bearing is ejected through the nozzle it would go all the way to the end and it would impact the end with the same force that was used to propel it.

but ball bearings do not compress and if we were not using compressed air or gasses or something to propel the ball bearings the ball bearings would just sit in the tank and never leave.

Edited by paul (03/07/11 03:11 PM)
3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.