Original teaching cases
Comprehensive physics cases
Understand forces, motion, circuits and energy together in one connected apparatus.
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 →