Original teaching cases
Comprehensive physics cases
Understand forces, motion, circuits and energy together in one connected apparatus.
How much energy reaches the spring?
One slider on one continuous route: accelerate downhill, lose energy to friction, then compress a spring. Not three separate experiments.
Explore the problem →Pull the platform. Does the block follow?
Change only the pull or its target in one apparatus to compare moving together, relative sliding and frictional heating.
Explore the problem →The rod that gets harder to accelerate
One rod links motion, current and heating. Why doesn't a constant pull produce constant acceleration?
Explore the problem →Cross the field. When does the current stop?
One rod accelerates, cruises, then accelerates again. Follow motion and current across the same field boundaries.
Explore the problem →A stopped motor uses no electricity. Really?
Follow energy from the source and series resistor through a motor and drum to a lifted load.
Explore the problem →