swansont Posted October 14, 2020 Share Posted October 14, 2020 53 minutes ago, Charles 3781 said: What if the magnet is attached to the door of a refrigerator. The door has a smooth glossy coat of paint, which offers very little frictional resistance to the downward pull of gravity. Why doesn't this constant downward pull make the magnet gradually slide down the door, until it falls off at the bottom onto the floor? Sometimes it does. Depends on how much friction there is, and how strong the magnet is. Gravity doesn’t “run out”, either. An object sitting on a table doesn’t need a constant supply of energy to stay there. Same with an electric field. Link to comment Share on other sites More sharing options...
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