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Energy Transformation

Does energy disappear, or just change form? 🎢 Set the roller coaster's start and hill heights, then press ▶. The bar's length never changes, only shifting colors between potential↔kinetic energy. Turn on friction and watch red heat grow as it slows down — energy didn't vanish, it turned into heat! See if it can pass a hill higher than the start. 🔄 In Find Transformations, explore 12 energy chains like lamps, solar cells, plants, bike generators, and steam trains. 🎯 Fill in the blanks in the Challenge. Supports 7 languages.