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After this lesson, you should be able to:

  • Distinguish between open and isolated systems
  • Distinguish between internal and external forces in relation to open and isolated systems
  • State the law of conservation of (linear) momentum and the conditions under which it holds
  • Distinguish between elastic and inelastic collisions in terms of conservation of kinetic energy
  • Link the conservation of linear momentum to Newton’s third law of motion
  • Apply the law of conservation of momentum to collisions and explosions (in cases along a straight line)