You literally looked at this picture above and asked me those questions.
Yes, because you still don't understand.
Look at the picture again.
Kinetic energy doesn't just magically vanish. Nor does it just magically convert into heat.
Instead, various forces/interactions convert the kinetic into heat, i.e. friction and air resistance.
i.e. friction converts the kinetic energy into heat which is then lost to the environment.
Friction is a force.
And again, this pendulum is quite different to a rocket in space.
This picture clearly highlights 2 significant sources, (although one is more viscoelastic behaviour with deformation causing conversion to heat), the pivot where the string is bending/sliding/whatever, and air resistance.
But again, in space, that air resistance is negligible, and far more importantly, THERE ISN'T A STRING ATTACHING IT TO A PIVOT!
We've already seen friction from the vacuum pendulum.
You mean we have seen friction from the pivot attached to the pendulum.
That has no bearing on a vacuum or not.
So no, we have not seen vacuums causing friction.
We have seen a pivot causing friction.
Friction is needed for the shuttle to move, so yes, this same thing happens.
Again, stop acting like the engine is running the entire time pushing on the rocket trying to stop it.
You cannot just say "Hey look, under these highly specific circumstances there was friction (ignoring that it accelerates the rocket), so there is always going to be massive amounts of friction to stop it".
Again, the shuttle accelerates due to a rocket engine producing high pressure gas to push the rocket.
Once that engine shuts off, there is no more high pressure gas. Instead you just have the negligible (near 0) pressure of space. That is not a significant source of friction.
So no, we don't expect it to just stop after a few minutes.
With the friction being negligible we expect it to take an incredibly long time to stop. Plenty of time for space travel.
Except for high friction areas (see the aforementioned ice and snow)
Ice is low friction, not high.
momentum results in kinetic energy lost to conversion with not much aftereffect.
Again, notice the key part, it needs to be converted.
It doens't magically vanish.
You need some kind of interaction to convert the kinetic energy into heat.
With ice and snow, and an angular snope, it is rather difficult to lose momentum.
i.e. with minimal friction, it is rather difficult to lose momentum, because you don't have a force trying to stop you.
in high friction ice
Again, ice is low friction.
Vacuums have even less.
What force? Haven't you been listening? Look at the picture again.
Yes, look at the picture again.
Notice what it says?
One source is air resistance, which is effectively removed (made almost entirely insignificant) in a vacuum. So that clearly can't be what is stopping the shuttle. And from the tests, we see that isn't significant for most pendula either.
The other source, is stated in the diagram as "string bending at fulcrum". This is the main source of friction stopping most pendula.
Ignoring that fact wont change it.
No force needed to stop it.
So now you just blatantly lie?
Friction is a force.
The diagram shows this friction, with this friction taking away the kinetic energy, turning into heat.
So yes, YOU DO NEED A FORCE TO STOP IT!
All the evidence you need a force to stop things.
No evidence at all shows things magically stop without a force.
What's that? You still have questions? Keep looking at this pendulum.
The pendulum supports my question and shows your argument is pure BS.
Again, remove the pivot, and remove the air, and you don't have the friction to stop it, so it should keep going.
Now again:
WHERE DOES THE KINETIC ENERGY GO?
WHERE DOES THE MOMENTUM GO?
WHAT FORCE IS ACTING TO STOP IT?
Again, without something to interact with, to apply a force, you can't have the kinetic energy magically vanish.
It can't just magically turn to heat.