Conceptual question regarding equal and opposite reactions

AI Thread Summary
In a vacuum, when a hole is poked in a pressurized can, the can moves towards the hole due to the pressure difference created. However, when the can is placed within a pressurized container and a hole is made, the movement is less clear. The discussion draws parallels to the Feynman sprinkler problem, suggesting that the can may not move significantly. An experiment with a submerged water bottle shows that the movement is minimal, indicating that pressure dynamics play a crucial role. Ultimately, the behavior of the can depends on the surrounding pressure conditions and the forces acting on it.
mateomy
Messages
305
Reaction score
0
Suppose you have a can (like a spray can) in a vacuum. You poke a hole in the can and the pressure from the can pushes it to the right. Now suppose you have a vacuumed can within a pressurized container and then you poke a hole in it. Which way (if at all) does it move?

I know this is sort of like the Feynman sprinkler problem, and because of this (I guess) similar analog I keep thinking that it won't go anywhere. Is this correct?

I don't think it will go anwhere. I actually poked a hole in a water bottle and submerged it in my sink to prove it to myself. It didn't go anywhere, but I can't explain it using Newton's laws. Any help?
 
Physics news on Phys.org
Hi mateomy, :)

Here's how I believe it works.

Initially the vacuum can will have the same pressure on all sides.
When you poke a hole in one side, you effectively reduce the pressure on that side.
So the can will move towards the hole.

With an empty water bottle in a sink the force will be rather small.
But then, if you have a full water bottle and put it a table, I don't think it will move (much) when you unplug it.
 
Thread 'Question about pressure of a liquid'
I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
Back
Top