Lesson Plan: Equilibrium of a Rigid Body under Coplanar Couples Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to investigate the equilibrium of a rigid body under the action of two or more coplanar couples.


Students will be able to

  • understand the relationship between two or more couples and the equilibrium of a body,
  • determine whether a body is in equilibrium under the action of two or more couples,
  • use facts about couples and equilibrium to solve problems.


Students should already be familiar with

  • moments and couples,
  • resolving forces.


Students will not cover

  • systems of forces equivalent to a couple.

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