Hello again Paul smile

Originally Posted By: paul
#34780 - June 07, 2010 10:54 PM
the air inside the pipe and tank equalize.

there is no force applied to the pipe that could stop the pipe.

if so then what force and where?

This all sounds familiar. The 'what force' is the force of the air hitting the pipe. 'where' is all over the inside of the pipe, but more on the back end because that was moving towards the air and crashed into it at a higher relative velocity than the other parts of the pipe.