Weight - the force exerted on a body by gravity, Newton - Invented by Sir Isaac Newton, Balanced - arrangement and good proportion, Unbalanced - Not good arrangement and proportion., Air resistance - Part of the drag that happens when the air touches., Repel - to drive or force something back, either physically, like a magnet pushing another magnet's pole away, or conceptually, like a smell that causes aversion, Magnetism - the force exerted by magnets, causing attraction or repulsion, which is a result of moving electric charges at a microscopic level., Static - something that is not moving or changing., Electro - the interaction between two charged particles, where opposite charges attract and like charges repel., Gravitational - The law states that the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers of mass. , Nuclear force - a force that acts between hadrons, most commonly observed between protons and neutrons of atoms., Contact - Two object touches each other., Upthrust - the upward force exerted by a fluid (liquid or gas) on an object submerged in it., Friction - Two objects rub against each other., Fluid friction - Through liquid or gases.,

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