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Gears and Speed

Connect gears of different sizes and discover how the number of teeth changes speed and turning force.

Grade 6ExperimentBuildEngineeringScienceMachinesPhysicsMeasurementIntermediate40 to 65 min4 materials

What you'll learn

  • Count turns and teeth to find a gear ratio
  • Explain how a small driving gear and a big driven gear trade speed for force
  • Predict the turns of a gear train

Objective

Find the gear ratio of gear pairs by counting turns and relate it to the number of teeth.

STEM concepts

GearsGear ratioSpeed and torqueSimple machines
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Materials and safety
Step-by-step instructions
Prediction, test sheet and results
Why does it work, challenge and project report

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