Lesson Plan: The Negative Mass Method Mathematics • Third Year of Secondary School

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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).