I can calculate work and mechanical advantage using measured force and distance data from a mechanism.
POE Unit 1 • Lesson 1.3
Force, Distance, Work, and Mechanical Advantage
Focus question: How can force and distance measurements prove whether a mechanism provides mechanical advantage?
Mission Briefing
Today’s Plan
A focused lesson sequence that builds toward the VEX Rover Mechanisms Challenge.
Opening promptConcept voteAerospace linkCompare optionsEvidence challengeQuick checkExit ticket
Lesson Targets
What You Will Be Able to Do
Work and mechanical advantage calculation set
Calculations use correct units and connect force-distance tradeoffs to mechanical advantage and efficiency.
Activity Flow
How the Lesson Moves
This page highlights the lesson elements you need for practice, evidence, and submission.
1. Measure force and distance
Record input and output force and travel over the same mechanism cycle.
2. Calculate performance
Determine work, actual mechanical advantage, and efficiency.
3. Interpret the tradeoff
Explain why increased output force requires increased input distance or another cost.
Lesson Interactive
Analyze Force, Distance, Work, and Mechanical Advantage
A mechanism uses 25 N of input force over 0.80 m to move an 80 N load through 0.20 m. Calculate the performance values.
Measured Data
25 NInput force
0.80 mInput distance
80 NOutput force
0.20 mOutput distance
Use W = Fd, AMA = output force ÷ input force, and efficiency = output work ÷ input work × 100.
Your Analysis
Complete all four calculations and choose the conclusion supported by the data.
Today’s Work
Main Deliverable
Work and Mechanical Advantage Calculation Set
Complete one evidence table for a tested or provided mechanism.
- Show input work, output work, actual mechanical advantage, and efficiency with units.
- Write one conclusion connecting the results to the force-distance tradeoff.
Exit Ticket
Mission Debrief
One way today’s lesson connects to an aerospace mechanism or VEX rover system.
One type of evidence you could use to support a design decision.
One question you still have about mechanisms, energy, power, or the Unit 1 challenge.
Resources
Lesson Resources
Principles of Engineering
Return to the POE course hub for units, resources, certifications, and current course information.
VEX Rover Mechanisms Challenge
Use this unit project context when connecting the lesson to mechanism planning, testing, and design review evidence.