Macroscopic Energy at the system (large)level Potential Energy (PE): -elevation in a gravitational mg field compared to some reference Z level F Reference plane PE =mgz pe g3 V=0 V>0 Kinetic Energy (KE): -motion relative to some m m reference frame v2 V2 KE ke reference m 2 2 Are they properties of a system? 上降文通大学 March 5,2019 6 SHANGHAI JLAO TONG UNIVERSITYMarch 5, 2019 6 Macroscopic Energy Potential Energy (PE): –elevation in a gravitational field compared to some reference level Kinetic Energy (KE): –motion relative to some reference frame at the system (large) level Are they properties of a system?