Lesson Plan: The Lorentz Velocity Transformation Physics • 9th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to calculate the velocity of an object in a reference frame that has a relative speed to the frame that the velocity was measured in.


Students will be able to

  • use 𝑣=(𝑣+𝑢) in all permutations for parallel motion,
  • use 𝑣=(𝑣𝑢) in all permutations for antiparallel motion,
  • realize that 𝑐 is the same in all reference frames,
  • interpret graphs of the Lorentz and Galilean velocity transformations.


Students should already be familiar with

  • inertial reference frames,
  • Einstein’s postulates,
  • the Lorentz factor.


Students will not cover

  • length contraction,
  • time dilation,
  • coordinate transforms,
  • metrics,
  • intervals,
  • the relativistic Doppler effect,
  • relativistic mass, momentum, and energy.

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