Why do doors slam when a window is open in the same room?

Question

Why do doors slam when a window is open in the same room?

In: Physics

Answer 1

When the window is closed, the air in the room has to compress or escape from the tiny cracks around.
The air then slows the door down.

When the window is open, all the air goes out the window, so there is nothing to slow the door down, so it slams.