Why do doors close so hard when the windows are open?

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Even if it’s not windy at all, my door would slam with the slightest push. Does not happen with my windows closed.

In: Physics

4 Answers

Anonymous 0 Comments

When your door closes it’s pushing a bunch of air mostly into the car (or room, if it’s small), and that air doesn’t have anywhere to go once it’s in there so it tries to push back against the door, providing a bit of a cushion when you close the door. If the window is open, suddenly that air can just go all the way through and isn’t pushing back on the door as hard.

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