🛹 Conservation of energy
Unit 3 · Forces, energy & reactions · 9 min
Energy is neither created nor destroyed, only transformed. A skater rolling down turns potential energy into kinetic energy; climbing back turns it into potential energy. Friction turns some into heat.
Words in this lesson
- 动能 (dòng néng) — kinetic energy
- 势能 (shì néng) — potential energy
Project: List 5 energy conversions at home (e.g. kettle: electrical → heat).
