Lesson Plan: The Negative Mass Method Mathematics • Third Year of Secondary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find the center of gravity of a lamina that contains holes using the negative mass method.
Objectives
Students will be able to
- calculate the center of gravity of laminas that contain holes using the negative mass method,
- solve applied problems involving the center of gravity of laminas containing holes,
- calculate the center of gravity of a lamina where a part is cut and moved to a different position (including examples of corners folded over).
Prerequisites
Students should already be familiar with
- calculating the center of gravity of systems of particles,
- calculating the center of gravity of laminas composed of various shapes,
- solving center of gravity problems where a lamina is cut by partitioning (not using the negative mass method).
Exclusions
Students will not cover
- the center of gravity of 3D systems.
