Energy, Power, and Energy Efficiency (VCE SSCE Physics): Flashcards

Property of a body giving it the ability to do work

$E_g = mg\Delta h$

$E_k = \frac{1}{2}mv^2$

Total energy in a closed system remains constant

How quickly energy is transferred or work is done

$P = \frac{E}{t}$

Watt (W) or $\text{J s}^{-1}$

$\eta = \frac{\text{useful energy out}}{\text{total energy in}}$

Transfer: between objects; Transformation: form changes

Proportional to velocity squared ($E_k \propto v^2$)