My question is related to this one but distinct as this case is trains travelling in the same direction.
We're familiar with this scenario. You're sitting in train A and another passes at high speed and your windows slam shut:
===[ train A ]=== stationary ===[ train B ]=== -> 60km/h
Often when tran B passes a bit slower the windows do not slam, e.g:
===[ train A ]=== stationary ===[ train B ]=== -> 40km/h
I'm interested in the nuanced scenario which I observer regularly, when you're travelling at medium speed in train A and train B passes relatively slowly, yet all the windows slam shut:
===[ train A ]=== -> 40km/h ===[ train B ]=== -> 45km/h
What is the explanation for this behaviour? These are the sort of windows I'm talking about - opening inwards with a reasonably strong spring that tries to keep the window either open or closed.