Why do doors close easier with a window open?
In: Physics
This has to do with the amount of air contained within the room. Whenever a door is closed some amount of air is moved.
If the door is closed from the outside, it slightly increases the amount of air in the room. Now, this air will have a direct path to escape through an open window, making the door close easily. Otherwise, one can feel this slight change in pressure while closing the door.
Similarly, if the door is closed from the inside, it slightly decreases the amount of air in the room. Now, the required air to maintain the same pressure will have an easier path to enter through an open window, making the door close comfortably.
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