✓Lesson Snapshot
Student Objective
I can use equilibrium ideas to explain when a structure is balanced and why reaction forces matter.
Main Activity
Analyze simple supported structures and solve for unknown reactions using force and moment balance.
Deliverable
Equilibrium practice problems
Tools / Materials
Calculator, notebook, graph paper, demonstration beam or support model
1ProblemUnderstand the challenge and why it matters.
A structure that is not accelerating may still carry large internal loads. Equilibrium helps engineers calculate support reactions and check whether a design is balanced.
2ConceptLearn the engineering idea or skill.
Static equilibrium means the net force and net moment on a body are zero. Engineers use equilibrium to solve for unknown reaction forces and to understand how loads are shared by supports.
3ApplyUse the skill in a guided task.
Solve simple supported beam or payload platform problems using force balance and moment balance.
4DocumentRecord your evidence and decisions.
Show your equilibrium setup, equations, substitutions, units, and final support reactions for each problem.
5ReviewCheck quality and identify your next step.
Equilibrium work should communicate your reasoning. Do not skip the diagram, because the diagram defines the equations.
Lesson Resources
Use these files and shared website resources when they support today’s work.
Engineering Graph Paper
Use for sketches, force diagrams, calculations, structural layouts, and test planning.
Open ResourceMeasurement Data Sheet
Use for load tests, material tests, mass measurements, dimensions, and observations.
Open ResourceEngineering Resource Library
Templates, reference sheets, sketch paper, and course support files.
Open Resource