Lesson Plan: Triangle of Forces | Nagwa Lesson Plan: Triangle of Forces | Nagwa

# Lesson Plan: Triangle of Forces Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to solve problems about the equilibrium of a particle under the action of three forces meeting at a point using the resultant of forces or triangle of force method.

#### Objectives

Students will be able to

• find a missing force in a system in equilibrium using the triangle of forces rule,
• understand the conditions for equilibrium under two forces,
• understand the conditions for equilibrium under three coplanar forces meeting at a point and apply this to examples.

#### Prerequisites

Students should already be familiar with

• the Pythagorean theorem,
• forces given in terms of unit vectors, given in polar form, and represented graphically,
• the magnitude and direction of forces,
• equilibrium.

#### Exclusions

Students will not cover

• Lami’s rule,
• systems that are not in equilibrium.