Learning Targets
- Observe how different mechanisms move and transmit force.
- Compare advantages and limitations of linkages, hinges, cams, gears, and pulleys.
- Sketch a mechanism idea that could support the Unit 4 prototype.
IED Unit 4 • Lesson 4.6
Mechanism Exploration: Linkages, Hinges, Cams, Gears, and Pulleys
Focus question: How can physical mechanism exploration reveal design possibilities and limitations?
Your lesson guide
Objective
Observe how different mechanisms move and transmit force. Compare advantages and limitations of linkages, hinges, cams, gears, and pulleys. Sketch a mechanism idea that could support the Unit 4 prototype.
Materials
For the online work: a browser and your engineering notebook. Follow the activity’s materials list for any physical build, and get teacher approval before using equipment.
Plan your time
Suggested work block: 45–60 minutes. Physical builds and projects may span several classes; follow your teacher’s schedule.
Enable JavaScript to use this investigation. The lesson directions and report fields remain available below.
Mission Briefing
Today’s Plan
Use this page with the lesson presentation, your engineering notebook, and the tools or evidence assigned for Explore Physical Mechanism Behavior.
Success Looks Like
You can compare mechanism options and identify strengths, limits, and possible uses for a prototype.
LaunchLearnApplyCheckSubmit
Opening Prompt
How can physical mechanism exploration reveal design possibilities and limitations?
Connect your response to the decision, evidence, or quality standard required for Explore Physical Mechanism Behavior.
Reveal: useful engineering move
This lesson is ready to move forward when the evidence meets this standard: Observations connect physical behavior to a possible design use and a known limitation.
Core Skill
What We Are Practicing
Hands-on exploration reveals motion issues that diagrams may hide.
Each mechanism type has tradeoffs in complexity, control, reliability, and buildability.
Quick sketches help translate a mechanism idea into a build plan.
Your Task
Explore Physical Mechanism Behavior
Manipulate linkages, hinges, cams, gears, and pulleys to compare range, direction, speed, and limitations.
- Operate each assigned mechanism safely.
- Record the input and output behavior.
- Identify backlash, binding, limited travel, or another constraint.
- Sketch one promising mechanism arrangement.
Quality check: Observations connect physical behavior to a possible design use and a known limitation.
Lesson Interactive
Match Mechanisms to Their Functions
Connect linkages, cams, gears, pulleys, and hinges to the transformations they provide.
| Mechanism | Primary function |
|---|---|
| Four-bar linkage | |
| Cam and follower | |
| Gear pair | |
| Belt and pulley | |
| Hinge |
Think about what each mechanism changes: motion type, direction, speed, torque, or axis of rotation.
What You Will Submit
Mechanism Exploration Record
Submission standard: Observations connect physical behavior to a possible design use and a known limitation.
Resources
Lesson Resources
Lesson 4.6 PowerPoint
Use the lesson slides for guided practice, interactive checks, and the exit ticket.
Introduction to Engineering Design
Return to the IED course hub for units, resources, certifications, and current course information.
Build your lesson report
Checkpoint: is your evidence ready?
- Check calculations, units, labels, and measurements against the activity requirements.
- Record what actually happened, including unexpected results.
- Explain what you changed and why; attach required drawings, photos, CAD, or code in your classroom assignment.
Submit the evidence specified in the activity and your classroom assignment. The report below collects your notes, calculations, observations, and reflections; attach any required drawings, photos, CAD, or code separately.
A PDF download is not a submission. Review it, then upload it and any required attachments through your classroom assignment system.