C7 + C8 - Energy & Conservation

Types of energy

• Kinetic

• Potential

• Internal

Transfer mechanisms

• work

• heat

• matter transfer

• mechanical waves

• electrical transmission

• EM radiation

Isolated system model (energy)

Nonisolated system model (energy)

Work-KE theorem

*True when the only change in the system is speed

Work & potenial energy for conservative forces

conservative & nonconservative forces

c: energy is path-independent

nc: energy is path-dependent

conservative force to potential energy function

equilibrium

neutral: dU/dx = 0

stable: U’’ = +

unstable: U’’ = -

isolated system model (w/ kinetic friction)

internal energy