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  1. Motion of a particle in 3-dimensional space
  2. Energy
  3. Momentum and Force
  4. Angular Momentum (including the description of angular motion) 

Excerpt

In principle, Newtonian Mechanics can be derived from only Newton's Laws (which include

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∑F=ma) and the calculus of motion.

  However, energy and momentum follow from these assumptions and prove to be extremely useful ways to think about the world. 

Modern Extensions of Newtonian Mechanics

Modern physics (since 1800) offers four major extensions of Newtonian Physics:

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Relativity - As speeds approach that of light, the usual distinction between length and time breaks down as they transform into one another differently for differently moving observers according to the laws of Special Relativity.  Around massive objects, space-time is no longer Euclidian but becomes distorted according to the laws of General Relativity.

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