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Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].

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Is this collision elastic or inelastic?

In reality, you can never have a 100% elastic collision. There's always energy dissipated in the form of heat or used in the distortion of the colliding bodies (think of a tennis ball in slow motion: …
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