Gears and Ratios
Investigate how meshing gears transmit motion. Students compare tooth counts, rotation direction, gear ratios and speed or torque trade-offs in illustrative gear trains.…
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Digital Technologies · Robotics
Ultrasonic Sensors, Years 8–10
Students investigate how an ultrasonic sensor uses round-trip echo time to estimate distance, then calibrate noisy measurements and use a distance threshold to stop a robot before an obstacle. The full interactive is available to licensed Education Universe users.
Years 8–10Guided investigationrobotics
Learning outcomes
- Calculate distance from echo time.
- Explain why sensor readings are noisy.
- Use a threshold in a control rule.
Teaching guidance
Ask students why the echo time is halved when calculating distance.
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Ultrasonic Sensors is one of the licensed interactives in The Education Universe. This page describes it; teachers use it in lessons and classes with a licence or the free trial.