Unit 3 · Work, Energy, and Power
Chapter 3.3
Conservation of Energy and Power
Drop a ball. Put Earth inside the system and stored energy turns into motion; leave Earth outside and the same fall is work done from beyond the boundary. Both accountings are right.
free · lesson 12 of 18
By the end
- 01Apply conservation of mechanical energy to a chosen system
- 02Show how the choice of system decides whether energy changes inside it or is transferred across the boundary as work, friction's dissipation included
- 03Compute average power as energy per time and instantaneous power as parallel force times speed