The trick of pulling a tablecloth quickly from a table full of dishes without them falling is based on the Law of Inertia. According to this law, objects tend to resist changes in their state of motion. When you pull the tablecloth quickly, the dishes on top of it tend to stay at rest due to their inertia, while the friction between the tablecloth and the dishes is minimized. This allows you to remove the tablecloth without disturbing the dishes.
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