Quote:
When I say 'stop' I mean stop in the direction we're considering. Sure it keeps going at a speed of 40m/s, but as its velocity changes from backwards to forwards, the longitudinal component of it must obviously pass through 0.


ok , are you still saying that the pipe will stop and then
move in the (+) direction?

because we need to clear that up first.

durring the time that the mass passes through the 1st turn.

I am saying that the pipe slows and stops.
and
I am saying that the mass still has a velocity of 40 m/s.
what are you saying?

please finalize your answers by simply stating them as I did above.

Quote:
If you're saying the mass doesn't experience a force in the turnaround, then you're saying Newton's 1st, 2nd and 3rd laws are all wrong.



if these laws are correct then the math will back them up.

if these laws are not correct then the math will not back them up , and they should be disposed or corrected.

we cannot anlalyze this concept using laws.

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