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Unformatted text preview: The Fundamental Interactions
1. Gravitational -- Attracts objects to the Earth. -- Guides planets, moons, asteroids, comets, & stars in their paths (orbits) through space. 2. Electromagnetic -- Electric charge interactions. -- Binds electrons to atoms. Static electricity. Chemistry. -- Electric current & electric circuits. -- Magnets, motors, generators, light/EM waves. 3. Weak (nuclear) -- Governs certain radioactive decays & elementary particle transformations/reactions. 4. Strong (nuclear) -- Binds protons & neutrons in nuclei. Gravitational is "weakest" but has longest range effects. In Physics 112 (Macroscopic Mechanics): Non-contact Forces -- Gravity, Magnetism (also known as "field" forces) Contact forces (all others) -- very short-range forces (macroscopic manifestations of microscopic-scale electromagnetic forces between atoms & molecules) Solids Compression Tension Springs Normal Friction Fluids Pressure Buoyancy Thrust Lift Drag ...
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