Epsilon(AS) | Physics | Momentum and Collisions | Lesson plan


Jan 11 -18 (1 week)


  • Linear and angular monetum
  • Law of conservation of momentum
  • Elastic and inelastic collisions

Instructional objectives

Students should be able to:

  • state the principle of conservation of momentum (linear and angular)
  • apply the principle of conservation of momentum to solve simple problems, including elastic and inelastic interactions between bodies in

both one and two dimensions

  • recognise that, for a perfectly elastic collision, the relative speed of approach is equal to the relative speed of separation
  • understand that, while momentum of a system is always conserved in interactions between bodies, some change in kinetic energy may take place
  • Understand the term co-efficient of restitution and apply it

Teaching Process

  • Show that the law of conservation of momentum is a consequence of Newton's second law
  • Understand that momentum is a clever way of working around forces during a collision
  • Understand that momentum= impulse is a cause effect relationship p=fAvg*t and all variables are not equal.
  • Using observations of collisions between different masses and tallying observations with theoretical solutions
  • working out different collision cases and seeing the importance of using law of conservation of energy.
  • Simple references of similarity to angular momentum and its conservation are mentioned along the way


  • Studying collisions
  • Newton's cradle
  • Basketball + tennis ball bouncing demonstration and derivation

Suggested reading / References

Assignments / Evaluation

  • written test
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